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Finding the Fourth Proportional to 52,691.80, 72,716.34 and 28,819.12

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Solution

The fourth proportional to 52,691.80, 72,716.34 and 28,819.12 is: 39,771.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,691.80 : 72,716.34 = 28,819.12 : x
  2. Step 2: Convert to fraction form
    52,691.80/72,716.34 = 28,819.12/x
  3. Step 3: Cross multiply
    52,691.80x = 72,716.34 × 28,819.12
  4. Step 4: Simplify right side
    52,691.80x = 2,095,620,928.42
  5. Step 5: Solve for x
    x = 2,095,620,928.42/52,691.80
  6. Step 6: Final answer
    x = 39,771.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.