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Finding the Fourth Proportional to 116.30, 174.50 and 83.90

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Solution

The fourth proportional to 116.30, 174.50 and 83.90 is: 125.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.30 : 174.50 = 83.90 : x
  2. Step 2: Convert to fraction form
    116.30/174.50 = 83.90/x
  3. Step 3: Cross multiply
    116.30x = 174.50 × 83.90
  4. Step 4: Simplify right side
    116.30x = 14,639.26
  5. Step 5: Solve for x
    x = 14,639.26/116.30
  6. Step 6: Final answer
    x = 125.88

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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.