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Finding the Fourth Proportional to 101.47, 152.21 and 98.77

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Solution

The fourth proportional to 101.47, 152.21 and 98.77 is: 148.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.47 : 152.21 = 98.77 : x
  2. Step 2: Convert to fraction form
    101.47/152.21 = 98.77/x
  3. Step 3: Cross multiply
    101.47x = 152.21 × 98.77
  4. Step 4: Simplify right side
    101.47x = 15,033.78
  5. Step 5: Solve for x
    x = 15,033.78/101.47
  6. Step 6: Final answer
    x = 148.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.