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Finding the Fourth Proportional to 73,831.80, 110,747.70 and 68,129.40

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Solution

The fourth proportional to 73,831.80, 110,747.70 and 68,129.40 is: 102,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,831.80 : 110,747.70 = 68,129.40 : x
  2. Step 2: Convert to fraction form
    73,831.80/110,747.70 = 68,129.40/x
  3. Step 3: Cross multiply
    73,831.80x = 110,747.70 × 68,129.40
  4. Step 4: Simplify right side
    73,831.80x = 7,545,174,352.38
  5. Step 5: Solve for x
    x = 7,545,174,352.38/73,831.80
  6. Step 6: Final answer
    x = 102,194.10

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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.