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Finding the Fourth Proportional to 67,877.71, 101,831.19 and 20,488.83

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Solution

The fourth proportional to 67,877.71, 101,831.19 and 20,488.83 is: 30,737.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,877.71 : 101,831.19 = 20,488.83 : x
  2. Step 2: Convert to fraction form
    67,877.71/101,831.19 = 20,488.83/x
  3. Step 3: Cross multiply
    67,877.71x = 101,831.19 × 20,488.83
  4. Step 4: Simplify right side
    67,877.71x = 2,086,401,940.61
  5. Step 5: Solve for x
    x = 2,086,401,940.61/67,877.71
  6. Step 6: Final answer
    x = 30,737.66

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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.