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Finding the Fourth Proportional to 86,479.92, 129,769.90 and 36,556.80

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Solution

The fourth proportional to 86,479.92, 129,769.90 and 36,556.80 is: 54,856.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,479.92 : 129,769.90 = 36,556.80 : x
  2. Step 2: Convert to fraction form
    86,479.92/129,769.90 = 36,556.80/x
  3. Step 3: Cross multiply
    86,479.92x = 129,769.90 × 36,556.80
  4. Step 4: Simplify right side
    86,479.92x = 4,743,972,280.32
  5. Step 5: Solve for x
    x = 4,743,972,280.32/86,479.92
  6. Step 6: Final answer
    x = 54,856.34

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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.