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Finding the Fourth Proportional to 71,451.28, 98,584.16 and 42,758.64

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Solution

The fourth proportional to 71,451.28, 98,584.16 and 42,758.64 is: 58,995.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,451.28 : 98,584.16 = 42,758.64 : x
  2. Step 2: Convert to fraction form
    71,451.28/98,584.16 = 42,758.64/x
  3. Step 3: Cross multiply
    71,451.28x = 98,584.16 × 42,758.64
  4. Step 4: Simplify right side
    71,451.28x = 4,215,324,607.14
  5. Step 5: Solve for x
    x = 4,215,324,607.14/71,451.28
  6. Step 6: Final answer
    x = 58,995.79

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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.