Home / 138,238,644.83-207,356,547.02-79,909,208.12

Finding the Fourth Proportional to 138,238,644.83, 207,356,547.02 and 79,909,208.12

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Solution

The fourth proportional to 138,238,644.83, 207,356,547.02 and 79,909,208.12 is: 119,862,991.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,238,644.83 : 207,356,547.02 = 79,909,208.12 : x
  2. Step 2: Convert to fraction form
    138,238,644.83/207,356,547.02 = 79,909,208.12/x
  3. Step 3: Cross multiply
    138,238,644.83x = 207,356,547.02 × 79,909,208.12
  4. Step 4: Simplify right side
    138,238,644.83x = 16,569,697,469,429,414
  5. Step 5: Solve for x
    x = 16,569,697,469,429,414/138,238,644.83
  6. Step 6: Final answer
    x = 119,862,991.21

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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.