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Finding the Fourth Proportional to 88.46, 131.98 and 83.90

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Solution

The fourth proportional to 88.46, 131.98 and 83.90 is: 125.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.46 : 131.98 = 83.90 : x
  2. Step 2: Convert to fraction form
    88.46/131.98 = 83.90/x
  3. Step 3: Cross multiply
    88.46x = 131.98 × 83.90
  4. Step 4: Simplify right side
    88.46x = 11,073.12
  5. Step 5: Solve for x
    x = 11,073.12/88.46
  6. Step 6: Final answer
    x = 125.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.