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Finding the Fourth Proportional to 100.32, 150.31 and 48.90

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Solution

The fourth proportional to 100.32, 150.31 and 48.90 is: 73.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.32 : 150.31 = 48.90 : x
  2. Step 2: Convert to fraction form
    100.32/150.31 = 48.90/x
  3. Step 3: Cross multiply
    100.32x = 150.31 × 48.90
  4. Step 4: Simplify right side
    100.32x = 7,350.16
  5. Step 5: Solve for x
    x = 7,350.16/100.32
  6. Step 6: Final answer
    x = 73.27

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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.