Home / 387,820,488.45-581,687,760.63-138,815,800.83

Finding the Fourth Proportional to 387,820,488.45, 581,687,760.63 and 138,815,800.83

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Solution

The fourth proportional to 387,820,488.45, 581,687,760.63 and 138,815,800.83 is: 208,208,319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,820,488.45 : 581,687,760.63 = 138,815,800.83 : x
  2. Step 2: Convert to fraction form
    387,820,488.45/581,687,760.63 = 138,815,800.83/x
  3. Step 3: Cross multiply
    387,820,488.45x = 581,687,760.63 × 138,815,800.83
  4. Step 4: Simplify right side
    387,820,488.45x = 80,747,452,324,862,800
  5. Step 5: Solve for x
    x = 80,747,452,324,862,800/387,820,488.45
  6. Step 6: Final answer
    x = 208,208,319.90

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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.