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Finding the Fourth Proportional to 102.08, 152.42 and 89.63

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Solution

The fourth proportional to 102.08, 152.42 and 89.63 is: 133.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.08 : 152.42 = 89.63 : x
  2. Step 2: Convert to fraction form
    102.08/152.42 = 89.63/x
  3. Step 3: Cross multiply
    102.08x = 152.42 × 89.63
  4. Step 4: Simplify right side
    102.08x = 13,661.40
  5. Step 5: Solve for x
    x = 13,661.40/102.08
  6. Step 6: Final answer
    x = 133.84

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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.