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Finding the Fourth Proportional to 124.03, 170.98 and 91.23

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Solution

The fourth proportional to 124.03, 170.98 and 91.23 is: 125.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.03 : 170.98 = 91.23 : x
  2. Step 2: Convert to fraction form
    124.03/170.98 = 91.23/x
  3. Step 3: Cross multiply
    124.03x = 170.98 × 91.23
  4. Step 4: Simplify right side
    124.03x = 15,597.64
  5. Step 5: Solve for x
    x = 15,597.64/124.03
  6. Step 6: Final answer
    x = 125.76

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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.