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Finding the Fourth Proportional to 124.30, 170.74 and 102.46

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Solution

The fourth proportional to 124.30, 170.74 and 102.46 is: 140.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.30 : 170.74 = 102.46 : x
  2. Step 2: Convert to fraction form
    124.30/170.74 = 102.46/x
  3. Step 3: Cross multiply
    124.30x = 170.74 × 102.46
  4. Step 4: Simplify right side
    124.30x = 17,494.02
  5. Step 5: Solve for x
    x = 17,494.02/124.30
  6. Step 6: Final answer
    x = 140.74

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.