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Finding the Fourth Proportional to 124.98, 171.18 and 117.60

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Solution

The fourth proportional to 124.98, 171.18 and 117.60 is: 161.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.98 : 171.18 = 117.60 : x
  2. Step 2: Convert to fraction form
    124.98/171.18 = 117.60/x
  3. Step 3: Cross multiply
    124.98x = 171.18 × 117.60
  4. Step 4: Simplify right side
    124.98x = 20,130.77
  5. Step 5: Solve for x
    x = 20,130.77/124.98
  6. Step 6: Final answer
    x = 161.07

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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.