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Finding the Fourth Proportional to 71,287.62, 98,375.88 and 39,455.82

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Solution

The fourth proportional to 71,287.62, 98,375.88 and 39,455.82 is: 54,448.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,287.62 : 98,375.88 = 39,455.82 : x
  2. Step 2: Convert to fraction form
    71,287.62/98,375.88 = 39,455.82/x
  3. Step 3: Cross multiply
    71,287.62x = 98,375.88 × 39,455.82
  4. Step 4: Simplify right side
    71,287.62x = 3,881,501,013.62
  5. Step 5: Solve for x
    x = 3,881,501,013.62/71,287.62
  6. Step 6: Final answer
    x = 54,448.46

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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.