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Finding the Fourth Proportional to 97.55, 145.56 and 87.32

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Solution

The fourth proportional to 97.55, 145.56 and 87.32 is: 130.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.55 : 145.56 = 87.32 : x
  2. Step 2: Convert to fraction form
    97.55/145.56 = 87.32/x
  3. Step 3: Cross multiply
    97.55x = 145.56 × 87.32
  4. Step 4: Simplify right side
    97.55x = 12,709.57
  5. Step 5: Solve for x
    x = 12,709.57/97.55
  6. Step 6: Final answer
    x = 130.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.