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Finding the Fourth Proportional to 81,770.80, 122,601.12 and 28,449.04

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Solution

The fourth proportional to 81,770.80, 122,601.12 and 28,449.04 is: 42,654.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,770.80 : 122,601.12 = 28,449.04 : x
  2. Step 2: Convert to fraction form
    81,770.80/122,601.12 = 28,449.04/x
  3. Step 3: Cross multiply
    81,770.80x = 122,601.12 × 28,449.04
  4. Step 4: Simplify right side
    81,770.80x = 3,487,884,166.92
  5. Step 5: Solve for x
    x = 3,487,884,166.92/81,770.80
  6. Step 6: Final answer
    x = 42,654.40

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1.5x scale

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.