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Finding the Fourth Proportional to 102.71, 153.35 and 88.25

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Solution

The fourth proportional to 102.71, 153.35 and 88.25 is: 131.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.71 : 153.35 = 88.25 : x
  2. Step 2: Convert to fraction form
    102.71/153.35 = 88.25/x
  3. Step 3: Cross multiply
    102.71x = 153.35 × 88.25
  4. Step 4: Simplify right side
    102.71x = 13,531.93
  5. Step 5: Solve for x
    x = 13,531.93/102.71
  6. Step 6: Final answer
    x = 131.76

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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.