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Finding the Fourth Proportional to 71,149.97, 98,178.59 and 39,316.97

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Solution

The fourth proportional to 71,149.97, 98,178.59 and 39,316.97 is: 54,252.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,149.97 : 98,178.59 = 39,316.97 : x
  2. Step 2: Convert to fraction form
    71,149.97/98,178.59 = 39,316.97/x
  3. Step 3: Cross multiply
    71,149.97x = 98,178.59 × 39,316.97
  4. Step 4: Simplify right side
    71,149.97x = 3,860,084,285.07
  5. Step 5: Solve for x
    x = 3,860,084,285.07/71,149.97
  6. Step 6: Final answer
    x = 54,252.79

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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.