Home / 398,720,123.20-598,347,679.20-139,934,843.20

Finding the Fourth Proportional to 398,720,123.20, 598,347,679.20 and 139,934,843.20

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Solution

The fourth proportional to 398,720,123.20, 598,347,679.20 and 139,934,843.20 is: 209,996,144.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,720,123.20 : 598,347,679.20 = 139,934,843.20 : x
  2. Step 2: Convert to fraction form
    398,720,123.20/598,347,679.20 = 139,934,843.20/x
  3. Step 3: Cross multiply
    398,720,123.20x = 598,347,679.20 × 139,934,843.20
  4. Step 4: Simplify right side
    398,720,123.20x = 83,729,688,667,935,904
  5. Step 5: Solve for x
    x = 83,729,688,667,935,904/398,720,123.20
  6. Step 6: Final answer
    x = 209,996,144.65

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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.