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Finding the Fourth Proportional to 126.10, 172.53 and 124.89

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Solution

The fourth proportional to 126.10, 172.53 and 124.89 is: 170.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.10 : 172.53 = 124.89 : x
  2. Step 2: Convert to fraction form
    126.10/172.53 = 124.89/x
  3. Step 3: Cross multiply
    126.10x = 172.53 × 124.89
  4. Step 4: Simplify right side
    126.10x = 21,547.27
  5. Step 5: Solve for x
    x = 21,547.27/126.10
  6. Step 6: Final answer
    x = 170.87

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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.