Home / 81,000,837,727.92-121,379,240,401.56-72,173,485,805.76

Finding the Fourth Proportional to 81,000,837,727.92, 121,379,240,401.56 and 72,173,485,805.76

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Solution

The fourth proportional to 81,000,837,727.92, 121,379,240,401.56 and 72,173,485,805.76 is: 108,151,509,662.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000,837,727.92 : 121,379,240,401.56 = 72,173,485,805.76 : x
  2. Step 2: Convert to fraction form
    81,000,837,727.92/121,379,240,401.56 = 72,173,485,805.76/x
  3. Step 3: Cross multiply
    81,000,837,727.92x = 121,379,240,401.56 × 72,173,485,805.76
  4. Step 4: Simplify right side
    81,000,837,727.92x = 8,760,362,884,235,920,408,576
  5. Step 5: Solve for x
    x = 8,760,362,884,235,920,408,576/81,000,837,727.92
  6. Step 6: Final answer
    x = 108,151,509,662.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.