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Finding the Fourth Proportional to 155.39, 232.43 and 99.59

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Solution

The fourth proportional to 155.39, 232.43 and 99.59 is: 148.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.39 : 232.43 = 99.59 : x
  2. Step 2: Convert to fraction form
    155.39/232.43 = 99.59/x
  3. Step 3: Cross multiply
    155.39x = 232.43 × 99.59
  4. Step 4: Simplify right side
    155.39x = 23,146.04
  5. Step 5: Solve for x
    x = 23,146.04/155.39
  6. Step 6: Final answer
    x = 148.96

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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.