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Finding the Fourth Proportional to 71,462.66, 98,619.12 and 39,630.87

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Solution

The fourth proportional to 71,462.66, 98,619.12 and 39,630.87 is: 54,690.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,462.66 : 98,619.12 = 39,630.87 : x
  2. Step 2: Convert to fraction form
    71,462.66/98,619.12 = 39,630.87/x
  3. Step 3: Cross multiply
    71,462.66x = 98,619.12 × 39,630.87
  4. Step 4: Simplify right side
    71,462.66x = 3,908,361,524.23
  5. Step 5: Solve for x
    x = 3,908,361,524.23/71,462.66
  6. Step 6: Final answer
    x = 54,690.96

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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.