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Finding the Fourth Proportional to 74,194.80, 111,292.20 and 72,007.80

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Solution

The fourth proportional to 74,194.80, 111,292.20 and 72,007.80 is: 108,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,194.80 : 111,292.20 = 72,007.80 : x
  2. Step 2: Convert to fraction form
    74,194.80/111,292.20 = 72,007.80/x
  3. Step 3: Cross multiply
    74,194.80x = 111,292.20 × 72,007.80
  4. Step 4: Simplify right side
    74,194.80x = 8,013,906,479.16
  5. Step 5: Solve for x
    x = 8,013,906,479.16/74,194.80
  6. Step 6: Final answer
    x = 108,011.70

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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.