Home / 81,000,837,650.92-121,379,240,286.06-72,173,485,728.76

Finding the Fourth Proportional to 81,000,837,650.92, 121,379,240,286.06 and 72,173,485,728.76

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Solution

The fourth proportional to 81,000,837,650.92, 121,379,240,286.06 and 72,173,485,728.76 is: 108,151,509,547.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000,837,650.92 : 121,379,240,286.06 = 72,173,485,728.76 : x
  2. Step 2: Convert to fraction form
    81,000,837,650.92/121,379,240,286.06 = 72,173,485,728.76/x
  3. Step 3: Cross multiply
    81,000,837,650.92x = 121,379,240,286.06 × 72,173,485,728.76
  4. Step 4: Simplify right side
    81,000,837,650.92x = 8,760,362,866,553,681,608,704
  5. Step 5: Solve for x
    x = 8,760,362,866,553,681,608,704/81,000,837,650.92
  6. Step 6: Final answer
    x = 108,151,509,547.44

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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.