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Finding the Fourth Proportional to 86,584.70, 129,767.70 and 42,115.70

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Solution

The fourth proportional to 86,584.70, 129,767.70 and 42,115.70 is: 63,120.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,584.70 : 129,767.70 = 42,115.70 : x
  2. Step 2: Convert to fraction form
    86,584.70/129,767.70 = 42,115.70/x
  3. Step 3: Cross multiply
    86,584.70x = 129,767.70 × 42,115.70
  4. Step 4: Simplify right side
    86,584.70x = 5,465,257,522.89
  5. Step 5: Solve for x
    x = 5,465,257,522.89/86,584.70
  6. Step 6: Final answer
    x = 63,120.36

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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.