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Finding the Fourth Proportional to 71,291.64, 98,375.72 and 42,605.60

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Solution

The fourth proportional to 71,291.64, 98,375.72 and 42,605.60 is: 58,791.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,291.64 : 98,375.72 = 42,605.60 : x
  2. Step 2: Convert to fraction form
    71,291.64/98,375.72 = 42,605.60/x
  3. Step 3: Cross multiply
    71,291.64x = 98,375.72 × 42,605.60
  4. Step 4: Simplify right side
    71,291.64x = 4,191,356,576.03
  5. Step 5: Solve for x
    x = 4,191,356,576.03/71,291.64
  6. Step 6: Final answer
    x = 58,791.70

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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.