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Finding the Fourth Proportional to 71,464.73, 98,627.38 and 39,643.88

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Solution

The fourth proportional to 71,464.73, 98,627.38 and 39,643.88 is: 54,711.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,464.73 : 98,627.38 = 39,643.88 : x
  2. Step 2: Convert to fraction form
    71,464.73/98,627.38 = 39,643.88/x
  3. Step 3: Cross multiply
    71,464.73x = 98,627.38 × 39,643.88
  4. Step 4: Simplify right side
    71,464.73x = 3,909,971,425.19
  5. Step 5: Solve for x
    x = 3,909,971,425.19/71,464.73
  6. Step 6: Final answer
    x = 54,711.91

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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.