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Finding the Fourth Proportional to 100.88, 151.18 and 92.30

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Solution

The fourth proportional to 100.88, 151.18 and 92.30 is: 138.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.88 : 151.18 = 92.30 : x
  2. Step 2: Convert to fraction form
    100.88/151.18 = 92.30/x
  3. Step 3: Cross multiply
    100.88x = 151.18 × 92.30
  4. Step 4: Simplify right side
    100.88x = 13,953.91
  5. Step 5: Solve for x
    x = 13,953.91/100.88
  6. Step 6: Final answer
    x = 138.32

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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.