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Finding the Fourth Proportional to 124.61, 187.58 and 113.45

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Solution

The fourth proportional to 124.61, 187.58 and 113.45 is: 170.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.61 : 187.58 = 113.45 : x
  2. Step 2: Convert to fraction form
    124.61/187.58 = 113.45/x
  3. Step 3: Cross multiply
    124.61x = 187.58 × 113.45
  4. Step 4: Simplify right side
    124.61x = 21,280.95
  5. Step 5: Solve for x
    x = 21,280.95/124.61
  6. Step 6: Final answer
    x = 170.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.