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Finding the Fourth Proportional to 115,230.66, 158,928.17 and 74,957.28

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Solution

The fourth proportional to 115,230.66, 158,928.17 and 74,957.28 is: 103,382.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,230.66 : 158,928.17 = 74,957.28 : x
  2. Step 2: Convert to fraction form
    115,230.66/158,928.17 = 74,957.28/x
  3. Step 3: Cross multiply
    115,230.66x = 158,928.17 × 74,957.28
  4. Step 4: Simplify right side
    115,230.66x = 11,912,822,963.79
  5. Step 5: Solve for x
    x = 11,912,822,963.79/115,230.66
  6. Step 6: Final answer
    x = 103,382.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.