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Finding the Fourth Proportional to 86,652.75, 129,979.13 and 31,248.75

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Solution

The fourth proportional to 86,652.75, 129,979.13 and 31,248.75 is: 46,873.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,652.75 : 129,979.13 = 31,248.75 : x
  2. Step 2: Convert to fraction form
    86,652.75/129,979.13 = 31,248.75/x
  3. Step 3: Cross multiply
    86,652.75x = 129,979.13 × 31,248.75
  4. Step 4: Simplify right side
    86,652.75x = 4,061,685,182.34
  5. Step 5: Solve for x
    x = 4,061,685,182.34/86,652.75
  6. Step 6: Final answer
    x = 46,873.13

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.