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Finding the Fourth Proportional to 86,239.92, 129,359.88 and 39,353.52

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Solution

The fourth proportional to 86,239.92, 129,359.88 and 39,353.52 is: 59,030.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,239.92 : 129,359.88 = 39,353.52 : x
  2. Step 2: Convert to fraction form
    86,239.92/129,359.88 = 39,353.52/x
  3. Step 3: Cross multiply
    86,239.92x = 129,359.88 × 39,353.52
  4. Step 4: Simplify right side
    86,239.92x = 5,090,766,624.78
  5. Step 5: Solve for x
    x = 5,090,766,624.78/86,239.92
  6. Step 6: Final answer
    x = 59,030.28

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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.