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Finding the Fourth Proportional to 86,486.34, 129,616.38 and 44,330.70

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Solution

The fourth proportional to 86,486.34, 129,616.38 and 44,330.70 is: 66,438.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,486.34 : 129,616.38 = 44,330.70 : x
  2. Step 2: Convert to fraction form
    86,486.34/129,616.38 = 44,330.70/x
  3. Step 3: Cross multiply
    86,486.34x = 129,616.38 × 44,330.70
  4. Step 4: Simplify right side
    86,486.34x = 5,745,984,856.87
  5. Step 5: Solve for x
    x = 5,745,984,856.87/86,486.34
  6. Step 6: Final answer
    x = 66,438.06

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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.