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Finding the Fourth Proportional to 124.65, 170.98 and 118.02

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Solution

The fourth proportional to 124.65, 170.98 and 118.02 is: 161.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.65 : 170.98 = 118.02 : x
  2. Step 2: Convert to fraction form
    124.65/170.98 = 118.02/x
  3. Step 3: Cross multiply
    124.65x = 170.98 × 118.02
  4. Step 4: Simplify right side
    124.65x = 20,179.06
  5. Step 5: Solve for x
    x = 20,179.06/124.65
  6. Step 6: Final answer
    x = 161.89

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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.