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Finding the Fourth Proportional to 102.05, 152.18 and 97.69

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Solution

The fourth proportional to 102.05, 152.18 and 97.69 is: 145.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.05 : 152.18 = 97.69 : x
  2. Step 2: Convert to fraction form
    102.05/152.18 = 97.69/x
  3. Step 3: Cross multiply
    102.05x = 152.18 × 97.69
  4. Step 4: Simplify right side
    102.05x = 14,866.46
  5. Step 5: Solve for x
    x = 14,866.46/102.05
  6. Step 6: Final answer
    x = 145.68

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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.