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Finding the Fourth Proportional to 124.68, 187.14 and 102.12

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Solution

The fourth proportional to 124.68, 187.14 and 102.12 is: 153.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.68 : 187.14 = 102.12 : x
  2. Step 2: Convert to fraction form
    124.68/187.14 = 102.12/x
  3. Step 3: Cross multiply
    124.68x = 187.14 × 102.12
  4. Step 4: Simplify right side
    124.68x = 19,110.74
  5. Step 5: Solve for x
    x = 19,110.74/124.68
  6. Step 6: Final answer
    x = 153.28

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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.