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Finding the Fourth Proportional to 97.35, 146.12 and 87.05

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Solution

The fourth proportional to 97.35, 146.12 and 87.05 is: 130.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.35 : 146.12 = 87.05 : x
  2. Step 2: Convert to fraction form
    97.35/146.12 = 87.05/x
  3. Step 3: Cross multiply
    97.35x = 146.12 × 87.05
  4. Step 4: Simplify right side
    97.35x = 12,719.68
  5. Step 5: Solve for x
    x = 12,719.68/97.35
  6. Step 6: Final answer
    x = 130.66

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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.