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Finding the Fourth Proportional to 81,642.61, 122,468.48 and 25,490.48

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Solution

The fourth proportional to 81,642.61, 122,468.48 and 25,490.48 is: 38,237.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,642.61 : 122,468.48 = 25,490.48 : x
  2. Step 2: Convert to fraction form
    81,642.61/122,468.48 = 25,490.48/x
  3. Step 3: Cross multiply
    81,642.61x = 122,468.48 × 25,490.48
  4. Step 4: Simplify right side
    81,642.61x = 3,121,780,340.07
  5. Step 5: Solve for x
    x = 3,121,780,340.07/81,642.61
  6. Step 6: Final answer
    x = 38,237.15

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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.