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Finding the Fourth Proportional to 71,449.71, 98,601.60 and 39,187.14

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Solution

The fourth proportional to 71,449.71, 98,601.60 and 39,187.14 is: 54,078.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,449.71 : 98,601.60 = 39,187.14 : x
  2. Step 2: Convert to fraction form
    71,449.71/98,601.60 = 39,187.14/x
  3. Step 3: Cross multiply
    71,449.71x = 98,601.60 × 39,187.14
  4. Step 4: Simplify right side
    71,449.71x = 3,863,914,703.42
  5. Step 5: Solve for x
    x = 3,863,914,703.42/71,449.71
  6. Step 6: Final answer
    x = 54,078.80

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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.