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Finding the Fourth Proportional to 70,874.91, 106,316.19 and 28,748.70

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Solution

The fourth proportional to 70,874.91, 106,316.19 and 28,748.70 is: 43,124.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,874.91 : 106,316.19 = 28,748.70 : x
  2. Step 2: Convert to fraction form
    70,874.91/106,316.19 = 28,748.70/x
  3. Step 3: Cross multiply
    70,874.91x = 106,316.19 × 28,748.70
  4. Step 4: Simplify right side
    70,874.91x = 3,056,452,251.45
  5. Step 5: Solve for x
    x = 3,056,452,251.45/70,874.91
  6. Step 6: Final answer
    x = 43,124.60

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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.