Home / 387,256,129.11-581,006,990.21-138,256,044.66

Finding the Fourth Proportional to 387,256,129.11, 581,006,990.21 and 138,256,044.66

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Solution

The fourth proportional to 387,256,129.11, 581,006,990.21 and 138,256,044.66 is: 207,427,907.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,256,129.11 : 581,006,990.21 = 138,256,044.66 : x
  2. Step 2: Convert to fraction form
    387,256,129.11/581,006,990.21 = 138,256,044.66/x
  3. Step 3: Cross multiply
    387,256,129.11x = 581,006,990.21 × 138,256,044.66
  4. Step 4: Simplify right side
    387,256,129.11x = 80,327,728,385,554,672
  5. Step 5: Solve for x
    x = 80,327,728,385,554,672/387,256,129.11
  6. Step 6: Final answer
    x = 207,427,907.13

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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.