Home / 387,256,124.38-581,006,983.10-138,256,039.92

Finding the Fourth Proportional to 387,256,124.38, 581,006,983.10 and 138,256,039.92

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Solution

The fourth proportional to 387,256,124.38, 581,006,983.10 and 138,256,039.92 is: 207,427,900.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,256,124.38 : 581,006,983.10 = 138,256,039.92 : x
  2. Step 2: Convert to fraction form
    387,256,124.38/581,006,983.10 = 138,256,039.92/x
  3. Step 3: Cross multiply
    387,256,124.38x = 581,006,983.10 × 138,256,039.92
  4. Step 4: Simplify right side
    387,256,124.38x = 80,327,724,649,272,368
  5. Step 5: Solve for x
    x = 80,327,724,649,272,368/387,256,124.38
  6. Step 6: Final answer
    x = 207,427,900.02

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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.