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Finding the Fourth Proportional to 73,887.70, 110,831.55 and 72,721.30

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Solution

The fourth proportional to 73,887.70, 110,831.55 and 72,721.30 is: 109,081.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,887.70 : 110,831.55 = 72,721.30 : x
  2. Step 2: Convert to fraction form
    73,887.70/110,831.55 = 72,721.30/x
  3. Step 3: Cross multiply
    73,887.70x = 110,831.55 × 72,721.30
  4. Step 4: Simplify right side
    73,887.70x = 8,059,814,397.02
  5. Step 5: Solve for x
    x = 8,059,814,397.02/73,887.70
  6. Step 6: Final answer
    x = 109,081.95

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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.