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Finding the Fourth Proportional to 101.68, 151.70 and 98.89

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Solution

The fourth proportional to 101.68, 151.70 and 98.89 is: 147.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.68 : 151.70 = 98.89 : x
  2. Step 2: Convert to fraction form
    101.68/151.70 = 98.89/x
  3. Step 3: Cross multiply
    101.68x = 151.70 × 98.89
  4. Step 4: Simplify right side
    101.68x = 15,001.61
  5. Step 5: Solve for x
    x = 15,001.61/101.68
  6. Step 6: Final answer
    x = 147.54

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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.