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Finding the Fourth Proportional to 100.07, 149.91 and 83.83

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Solution

The fourth proportional to 100.07, 149.91 and 83.83 is: 125.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.07 : 149.91 = 83.83 : x
  2. Step 2: Convert to fraction form
    100.07/149.91 = 83.83/x
  3. Step 3: Cross multiply
    100.07x = 149.91 × 83.83
  4. Step 4: Simplify right side
    100.07x = 12,566.21
  5. Step 5: Solve for x
    x = 12,566.21/100.07
  6. Step 6: Final answer
    x = 125.57

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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.