Home / 81,000,837,649.92-121,379,240,284.56-72,173,485,727.76

Finding the Fourth Proportional to 81,000,837,649.92, 121,379,240,284.56 and 72,173,485,727.76

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Solution

The fourth proportional to 81,000,837,649.92, 121,379,240,284.56 and 72,173,485,727.76 is: 108,151,509,545.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000,837,649.92 : 121,379,240,284.56 = 72,173,485,727.76 : x
  2. Step 2: Convert to fraction form
    81,000,837,649.92/121,379,240,284.56 = 72,173,485,727.76/x
  3. Step 3: Cross multiply
    81,000,837,649.92x = 121,379,240,284.56 × 72,173,485,727.76
  4. Step 4: Simplify right side
    81,000,837,649.92x = 8,760,362,866,324,042,416,128
  5. Step 5: Solve for x
    x = 8,760,362,866,324,042,416,128/81,000,837,649.92
  6. Step 6: Final answer
    x = 108,151,509,545.94

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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.