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Finding the Fourth Proportional to 81,342.93, 121,969.13 and 25,167.41

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Solution

The fourth proportional to 81,342.93, 121,969.13 and 25,167.41 is: 37,737.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,342.93 : 121,969.13 = 25,167.41 : x
  2. Step 2: Convert to fraction form
    81,342.93/121,969.13 = 25,167.41/x
  3. Step 3: Cross multiply
    81,342.93x = 121,969.13 × 25,167.41
  4. Step 4: Simplify right side
    81,342.93x = 3,069,646,366.37
  5. Step 5: Solve for x
    x = 3,069,646,366.37/81,342.93
  6. Step 6: Final answer
    x = 37,737.10

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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.