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Finding the Fourth Proportional to 71,710.92, 99,134.28 and 65,733.12

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Solution

The fourth proportional to 71,710.92, 99,134.28 and 65,733.12 is: 90,870.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,710.92 : 99,134.28 = 65,733.12 : x
  2. Step 2: Convert to fraction form
    71,710.92/99,134.28 = 65,733.12/x
  3. Step 3: Cross multiply
    71,710.92x = 99,134.28 × 65,733.12
  4. Step 4: Simplify right side
    71,710.92x = 6,516,405,523.35
  5. Step 5: Solve for x
    x = 6,516,405,523.35/71,710.92
  6. Step 6: Final answer
    x = 90,870.48

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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.