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Finding the Fourth Proportional to 86,638.32, 129,979.44 and 24,308.88

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Solution

The fourth proportional to 86,638.32, 129,979.44 and 24,308.88 is: 36,469.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,638.32 : 129,979.44 = 24,308.88 : x
  2. Step 2: Convert to fraction form
    86,638.32/129,979.44 = 24,308.88/x
  3. Step 3: Cross multiply
    86,638.32x = 129,979.44 × 24,308.88
  4. Step 4: Simplify right side
    86,638.32x = 3,159,654,609.43
  5. Step 5: Solve for x
    x = 3,159,654,609.43/86,638.32
  6. Step 6: Final answer
    x = 36,469.48

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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.