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Finding the Fourth Proportional to 113.52, 156.65 and 84.03

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Solution

The fourth proportional to 113.52, 156.65 and 84.03 is: 115.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.52 : 156.65 = 84.03 : x
  2. Step 2: Convert to fraction form
    113.52/156.65 = 84.03/x
  3. Step 3: Cross multiply
    113.52x = 156.65 × 84.03
  4. Step 4: Simplify right side
    113.52x = 13,162.88
  5. Step 5: Solve for x
    x = 13,162.88/113.52
  6. Step 6: Final answer
    x = 115.95

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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.