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Finding the Fourth Proportional to 95,421.60, 131,911.20 and 72,871.20

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Solution

The fourth proportional to 95,421.60, 131,911.20 and 72,871.20 is: 100,737.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,421.60 : 131,911.20 = 72,871.20 : x
  2. Step 2: Convert to fraction form
    95,421.60/131,911.20 = 72,871.20/x
  3. Step 3: Cross multiply
    95,421.60x = 131,911.20 × 72,871.20
  4. Step 4: Simplify right side
    95,421.60x = 9,612,527,437.44
  5. Step 5: Solve for x
    x = 9,612,527,437.44/95,421.60
  6. Step 6: Final answer
    x = 100,737.44

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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.