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Finding the Fourth Proportional to 86,089.92, 129,134.88 and 30,647.04

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Solution

The fourth proportional to 86,089.92, 129,134.88 and 30,647.04 is: 45,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,089.92 : 129,134.88 = 30,647.04 : x
  2. Step 2: Convert to fraction form
    86,089.92/129,134.88 = 30,647.04/x
  3. Step 3: Cross multiply
    86,089.92x = 129,134.88 × 30,647.04
  4. Step 4: Simplify right side
    86,089.92x = 3,957,601,832.76
  5. Step 5: Solve for x
    x = 3,957,601,832.76/86,089.92
  6. Step 6: Final answer
    x = 45,970.56

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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.