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Finding the Fourth Proportional to 80,695.20, 121,042.80 and 62,011.20

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Solution

The fourth proportional to 80,695.20, 121,042.80 and 62,011.20 is: 93,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,695.20 : 121,042.80 = 62,011.20 : x
  2. Step 2: Convert to fraction form
    80,695.20/121,042.80 = 62,011.20/x
  3. Step 3: Cross multiply
    80,695.20x = 121,042.80 × 62,011.20
  4. Step 4: Simplify right side
    80,695.20x = 7,506,009,279.36
  5. Step 5: Solve for x
    x = 7,506,009,279.36/80,695.20
  6. Step 6: Final answer
    x = 93,016.80

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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.