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Finding the Fourth Proportional to 155.58, 232.40 and 115.08

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Solution

The fourth proportional to 155.58, 232.40 and 115.08 is: 171.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.58 : 232.40 = 115.08 : x
  2. Step 2: Convert to fraction form
    155.58/232.40 = 115.08/x
  3. Step 3: Cross multiply
    155.58x = 232.40 × 115.08
  4. Step 4: Simplify right side
    155.58x = 26,743.36
  5. Step 5: Solve for x
    x = 26,743.36/155.58
  6. Step 6: Final answer
    x = 171.90

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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.