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Finding the Fourth Proportional to 199.93, 275.91 and 112.61

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Solution

The fourth proportional to 199.93, 275.91 and 112.61 is: 155.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.93 : 275.91 = 112.61 : x
  2. Step 2: Convert to fraction form
    199.93/275.91 = 112.61/x
  3. Step 3: Cross multiply
    199.93x = 275.91 × 112.61
  4. Step 4: Simplify right side
    199.93x = 31,070.23
  5. Step 5: Solve for x
    x = 31,070.23/199.93
  6. Step 6: Final answer
    x = 155.41

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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.