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Finding the Fourth Proportional to 124.14, 171.06 and 99.56

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Solution

The fourth proportional to 124.14, 171.06 and 99.56 is: 137.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.14 : 171.06 = 99.56 : x
  2. Step 2: Convert to fraction form
    124.14/171.06 = 99.56/x
  3. Step 3: Cross multiply
    124.14x = 171.06 × 99.56
  4. Step 4: Simplify right side
    124.14x = 17,030.73
  5. Step 5: Solve for x
    x = 17,030.73/124.14
  6. Step 6: Final answer
    x = 137.19

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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.