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Finding the Fourth Proportional to 71,654.57, 98,887.39 and 39,825.48

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Solution

The fourth proportional to 71,654.57, 98,887.39 and 39,825.48 is: 54,961.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,654.57 : 98,887.39 = 39,825.48 : x
  2. Step 2: Convert to fraction form
    71,654.57/98,887.39 = 39,825.48/x
  3. Step 3: Cross multiply
    71,654.57x = 98,887.39 × 39,825.48
  4. Step 4: Simplify right side
    71,654.57x = 3,938,237,772.70
  5. Step 5: Solve for x
    x = 3,938,237,772.70/71,654.57
  6. Step 6: Final answer
    x = 54,961.44

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1.5x scale

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.