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Finding the Fourth Proportional to 102.48, 140.66 and 97.08

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Solution

The fourth proportional to 102.48, 140.66 and 97.08 is: 133.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.48 : 140.66 = 97.08 : x
  2. Step 2: Convert to fraction form
    102.48/140.66 = 97.08/x
  3. Step 3: Cross multiply
    102.48x = 140.66 × 97.08
  4. Step 4: Simplify right side
    102.48x = 13,655.27
  5. Step 5: Solve for x
    x = 13,655.27/102.48
  6. Step 6: Final answer
    x = 133.25

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.