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Finding the Fourth Proportional to 97.36, 145.80 and 61.18

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Solution

The fourth proportional to 97.36, 145.80 and 61.18 is: 91.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.36 : 145.80 = 61.18 : x
  2. Step 2: Convert to fraction form
    97.36/145.80 = 61.18/x
  3. Step 3: Cross multiply
    97.36x = 145.80 × 61.18
  4. Step 4: Simplify right side
    97.36x = 8,920.04
  5. Step 5: Solve for x
    x = 8,920.04/97.36
  6. Step 6: Final answer
    x = 91.62

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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.