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Finding the Fourth Proportional to 71,288.88, 98,375.56 and 39,455.88

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Solution

The fourth proportional to 71,288.88, 98,375.56 and 39,455.88 is: 54,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,288.88 : 98,375.56 = 39,455.88 : x
  2. Step 2: Convert to fraction form
    71,288.88/98,375.56 = 39,455.88/x
  3. Step 3: Cross multiply
    71,288.88x = 98,375.56 × 39,455.88
  4. Step 4: Simplify right side
    71,288.88x = 3,881,493,822.74
  5. Step 5: Solve for x
    x = 3,881,493,822.74/71,288.88
  6. Step 6: Final answer
    x = 54,447.40

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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.