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Finding the Fourth Proportional to 83.43, 115.11 and 53.93

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Solution

The fourth proportional to 83.43, 115.11 and 53.93 is: 74.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.43 : 115.11 = 53.93 : x
  2. Step 2: Convert to fraction form
    83.43/115.11 = 53.93/x
  3. Step 3: Cross multiply
    83.43x = 115.11 × 53.93
  4. Step 4: Simplify right side
    83.43x = 6,208.17
  5. Step 5: Solve for x
    x = 6,208.17/83.43
  6. Step 6: Final answer
    x = 74.41

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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.