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Finding the Fourth Proportional to 71,630.60, 107,445.90 and 21,708.20

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Solution

The fourth proportional to 71,630.60, 107,445.90 and 21,708.20 is: 32,562.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,630.60 : 107,445.90 = 21,708.20 : x
  2. Step 2: Convert to fraction form
    71,630.60/107,445.90 = 21,708.20/x
  3. Step 3: Cross multiply
    71,630.60x = 107,445.90 × 21,708.20
  4. Step 4: Simplify right side
    71,630.60x = 2,332,457,086.38
  5. Step 5: Solve for x
    x = 2,332,457,086.38/71,630.60
  6. Step 6: Final answer
    x = 32,562.30

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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.