Home / 387,256,123.38-581,006,981.60-138,256,038.92

Finding the Fourth Proportional to 387,256,123.38, 581,006,981.60 and 138,256,038.92

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Solution

The fourth proportional to 387,256,123.38, 581,006,981.60 and 138,256,038.92 is: 207,427,898.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,256,123.38 : 581,006,981.60 = 138,256,038.92 : x
  2. Step 2: Convert to fraction form
    387,256,123.38/581,006,981.60 = 138,256,038.92/x
  3. Step 3: Cross multiply
    387,256,123.38x = 581,006,981.60 × 138,256,038.92
  4. Step 4: Simplify right side
    387,256,123.38x = 80,327,723,860,881,312
  5. Step 5: Solve for x
    x = 80,327,723,860,881,312/387,256,123.38
  6. Step 6: Final answer
    x = 207,427,898.52

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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.