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Finding the Fourth Proportional to 124.46, 172.54 and 117.87

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Solution

The fourth proportional to 124.46, 172.54 and 117.87 is: 163.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.46 : 172.54 = 117.87 : x
  2. Step 2: Convert to fraction form
    124.46/172.54 = 117.87/x
  3. Step 3: Cross multiply
    124.46x = 172.54 × 117.87
  4. Step 4: Simplify right side
    124.46x = 20,337.10
  5. Step 5: Solve for x
    x = 20,337.10/124.46
  6. Step 6: Final answer
    x = 163.40

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.