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Finding the Fourth Proportional to 110.03, 151.65 and 78.91

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Solution

The fourth proportional to 110.03, 151.65 and 78.91 is: 108.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.03 : 151.65 = 78.91 : x
  2. Step 2: Convert to fraction form
    110.03/151.65 = 78.91/x
  3. Step 3: Cross multiply
    110.03x = 151.65 × 78.91
  4. Step 4: Simplify right side
    110.03x = 11,966.32
  5. Step 5: Solve for x
    x = 11,966.32/110.03
  6. Step 6: Final answer
    x = 108.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.