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Finding the Fourth Proportional to 86,490.86, 129,641.51 and 33,842.48

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Solution

The fourth proportional to 86,490.86, 129,641.51 and 33,842.48 is: 50,726.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,490.86 : 129,641.51 = 33,842.48 : x
  2. Step 2: Convert to fraction form
    86,490.86/129,641.51 = 33,842.48/x
  3. Step 3: Cross multiply
    86,490.86x = 129,641.51 × 33,842.48
  4. Step 4: Simplify right side
    86,490.86x = 4,387,389,391.92
  5. Step 5: Solve for x
    x = 4,387,389,391.92/86,490.86
  6. Step 6: Final answer
    x = 50,726.63

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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.