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Finding the Fourth Proportional to 90.36, 124.65 and 53.52

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Solution

The fourth proportional to 90.36, 124.65 and 53.52 is: 73.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.36 : 124.65 = 53.52 : x
  2. Step 2: Convert to fraction form
    90.36/124.65 = 53.52/x
  3. Step 3: Cross multiply
    90.36x = 124.65 × 53.52
  4. Step 4: Simplify right side
    90.36x = 6,671.27
  5. Step 5: Solve for x
    x = 6,671.27/90.36
  6. Step 6: Final answer
    x = 73.83

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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.