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Finding the Fourth Proportional to 90.32, 124.61 and 52.97

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Solution

The fourth proportional to 90.32, 124.61 and 52.97 is: 73.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.32 : 124.61 = 52.97 : x
  2. Step 2: Convert to fraction form
    90.32/124.61 = 52.97/x
  3. Step 3: Cross multiply
    90.32x = 124.61 × 52.97
  4. Step 4: Simplify right side
    90.32x = 6,600.10
  5. Step 5: Solve for x
    x = 6,600.10/90.32
  6. Step 6: Final answer
    x = 73.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.