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Finding the Fourth Proportional to 97.52, 134.64 and 71.76

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Solution

The fourth proportional to 97.52, 134.64 and 71.76 is: 99.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.52 : 134.64 = 71.76 : x
  2. Step 2: Convert to fraction form
    97.52/134.64 = 71.76/x
  3. Step 3: Cross multiply
    97.52x = 134.64 × 71.76
  4. Step 4: Simplify right side
    97.52x = 9,661.77
  5. Step 5: Solve for x
    x = 9,661.77/97.52
  6. Step 6: Final answer
    x = 99.07

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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.