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Finding the Fourth Proportional to 92,425.68, 137,969.73 and 81,215.52

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Solution

The fourth proportional to 92,425.68, 137,969.73 and 81,215.52 is: 121,235.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,425.68 : 137,969.73 = 81,215.52 : x
  2. Step 2: Convert to fraction form
    92,425.68/137,969.73 = 81,215.52/x
  3. Step 3: Cross multiply
    92,425.68x = 137,969.73 × 81,215.52
  4. Step 4: Simplify right side
    92,425.68x = 11,205,283,366.21
  5. Step 5: Solve for x
    x = 11,205,283,366.21/92,425.68
  6. Step 6: Final answer
    x = 121,235.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.