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Finding the Fourth Proportional to 124.66, 187.04 and 90.37

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Solution

The fourth proportional to 124.66, 187.04 and 90.37 is: 135.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.66 : 187.04 = 90.37 : x
  2. Step 2: Convert to fraction form
    124.66/187.04 = 90.37/x
  3. Step 3: Cross multiply
    124.66x = 187.04 × 90.37
  4. Step 4: Simplify right side
    124.66x = 16,902.02
  5. Step 5: Solve for x
    x = 16,902.02/124.66
  6. Step 6: Final answer
    x = 135.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.