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Finding the Fourth Proportional to 86,469.75, 129,708.60 and 26,493.93

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Solution

The fourth proportional to 86,469.75, 129,708.60 and 26,493.93 is: 39,742.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,469.75 : 129,708.60 = 26,493.93 : x
  2. Step 2: Convert to fraction form
    86,469.75/129,708.60 = 26,493.93/x
  3. Step 3: Cross multiply
    86,469.75x = 129,708.60 × 26,493.93
  4. Step 4: Simplify right side
    86,469.75x = 3,436,490,568.80
  5. Step 5: Solve for x
    x = 3,436,490,568.80/86,469.75
  6. Step 6: Final answer
    x = 39,742.11

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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.