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Finding the Fourth Proportional to 275,124.85, 412,746.69 and 85,581.61

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Solution

The fourth proportional to 275,124.85, 412,746.69 and 85,581.61 is: 128,390.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,124.85 : 412,746.69 = 85,581.61 : x
  2. Step 2: Convert to fraction form
    275,124.85/412,746.69 = 85,581.61/x
  3. Step 3: Cross multiply
    275,124.85x = 412,746.69 × 85,581.61
  4. Step 4: Simplify right side
    275,124.85x = 35,323,526,252.37
  5. Step 5: Solve for x
    x = 35,323,526,252.37/275,124.85
  6. Step 6: Final answer
    x = 128,390.90

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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.