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Finding the Fourth Proportional to 86,287.98, 129,478.48 and 36,402.66

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Solution

The fourth proportional to 86,287.98, 129,478.48 and 36,402.66 is: 54,623.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,287.98 : 129,478.48 = 36,402.66 : x
  2. Step 2: Convert to fraction form
    86,287.98/129,478.48 = 36,402.66/x
  3. Step 3: Cross multiply
    86,287.98x = 129,478.48 × 36,402.66
  4. Step 4: Simplify right side
    86,287.98x = 4,713,361,084.76
  5. Step 5: Solve for x
    x = 4,713,361,084.76/86,287.98
  6. Step 6: Final answer
    x = 54,623.61

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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.