Home / 138,238,648.83-207,356,553.01-79,909,212.12

Finding the Fourth Proportional to 138,238,648.83, 207,356,553.01 and 79,909,212.12

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Solution

The fourth proportional to 138,238,648.83, 207,356,553.01 and 79,909,212.12 is: 119,862,997.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,238,648.83 : 207,356,553.01 = 79,909,212.12 : x
  2. Step 2: Convert to fraction form
    138,238,648.83/207,356,553.01 = 79,909,212.12/x
  3. Step 3: Cross multiply
    138,238,648.83x = 207,356,553.01 × 79,909,212.12
  4. Step 4: Simplify right side
    138,238,648.83x = 16,569,698,778,948,114
  5. Step 5: Solve for x
    x = 16,569,698,778,948,114/138,238,648.83
  6. Step 6: Final answer
    x = 119,862,997.21

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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.