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Finding the Fourth Proportional to 86,786.52, 130,132.95 and 39,375.74

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Solution

The fourth proportional to 86,786.52, 130,132.95 and 39,375.74 is: 59,042.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,786.52 : 130,132.95 = 39,375.74 : x
  2. Step 2: Convert to fraction form
    86,786.52/130,132.95 = 39,375.74/x
  3. Step 3: Cross multiply
    86,786.52x = 130,132.95 × 39,375.74
  4. Step 4: Simplify right side
    86,786.52x = 5,124,080,553.97
  5. Step 5: Solve for x
    x = 5,124,080,553.97/86,786.52
  6. Step 6: Final answer
    x = 59,042.36

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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.