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Finding the Fourth Proportional to 101.90, 152.02 and 83.81

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Solution

The fourth proportional to 101.90, 152.02 and 83.81 is: 125.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.90 : 152.02 = 83.81 : x
  2. Step 2: Convert to fraction form
    101.90/152.02 = 83.81/x
  3. Step 3: Cross multiply
    101.90x = 152.02 × 83.81
  4. Step 4: Simplify right side
    101.90x = 12,740.80
  5. Step 5: Solve for x
    x = 12,740.80/101.90
  6. Step 6: Final answer
    x = 125.03

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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.