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Finding the Fourth Proportional to 74,891.56, 112,348.86 and 28,147.72

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Solution

The fourth proportional to 74,891.56, 112,348.86 and 28,147.72 is: 42,225.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,891.56 : 112,348.86 = 28,147.72 : x
  2. Step 2: Convert to fraction form
    74,891.56/112,348.86 = 28,147.72/x
  3. Step 3: Cross multiply
    74,891.56x = 112,348.86 × 28,147.72
  4. Step 4: Simplify right side
    74,891.56x = 3,162,364,253.60
  5. Step 5: Solve for x
    x = 3,162,364,253.60/74,891.56
  6. Step 6: Final answer
    x = 42,225.91

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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.