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Finding the Fourth Proportional to 100.78, 151.14 and 32.32

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Solution

The fourth proportional to 100.78, 151.14 and 32.32 is: 48.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.78 : 151.14 = 32.32 : x
  2. Step 2: Convert to fraction form
    100.78/151.14 = 32.32/x
  3. Step 3: Cross multiply
    100.78x = 151.14 × 32.32
  4. Step 4: Simplify right side
    100.78x = 4,884.84
  5. Step 5: Solve for x
    x = 4,884.84/100.78
  6. Step 6: Final answer
    x = 48.47

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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.