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Finding the Fourth Proportional to 115.83, 158.76 and 109.35

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Solution

The fourth proportional to 115.83, 158.76 and 109.35 is: 149.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.83 : 158.76 = 109.35 : x
  2. Step 2: Convert to fraction form
    115.83/158.76 = 109.35/x
  3. Step 3: Cross multiply
    115.83x = 158.76 × 109.35
  4. Step 4: Simplify right side
    115.83x = 17,360.41
  5. Step 5: Solve for x
    x = 17,360.41/115.83
  6. Step 6: Final answer
    x = 149.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.