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Finding the Fourth Proportional to 112.74, 155.97 and 93.30

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Solution

The fourth proportional to 112.74, 155.97 and 93.30 is: 129.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    112.74 : 155.97 = 93.30 : x
  2. Step 2: Convert to fraction form
    112.74/155.97 = 93.30/x
  3. Step 3: Cross multiply
    112.74x = 155.97 × 93.30
  4. Step 4: Simplify right side
    112.74x = 14,552.00
  5. Step 5: Solve for x
    x = 14,552.00/112.74
  6. Step 6: Final answer
    x = 129.08

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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.