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Finding the Fourth Proportional to 83.00, 114.45 and 72.47

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Solution

The fourth proportional to 83.00, 114.45 and 72.47 is: 99.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.00 : 114.45 = 72.47 : x
  2. Step 2: Convert to fraction form
    83.00/114.45 = 72.47/x
  3. Step 3: Cross multiply
    83.00x = 114.45 × 72.47
  4. Step 4: Simplify right side
    83.00x = 8,294.21
  5. Step 5: Solve for x
    x = 8,294.21/83.00
  6. Step 6: Final answer
    x = 99.93

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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.