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Finding the Fourth Proportional to 83.10, 114.57 and 70.83

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Solution

The fourth proportional to 83.10, 114.57 and 70.83 is: 97.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.10 : 114.57 = 70.83 : x
  2. Step 2: Convert to fraction form
    83.10/114.57 = 70.83/x
  3. Step 3: Cross multiply
    83.10x = 114.57 × 70.83
  4. Step 4: Simplify right side
    83.10x = 8,114.99
  5. Step 5: Solve for x
    x = 8,114.99/83.10
  6. Step 6: Final answer
    x = 97.65

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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.