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Finding the Fourth Proportional to 278,501.88, 417,760.92 and 68,139.76

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Solution

The fourth proportional to 278,501.88, 417,760.92 and 68,139.76 is: 102,211.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,501.88 : 417,760.92 = 68,139.76 : x
  2. Step 2: Convert to fraction form
    278,501.88/417,760.92 = 68,139.76/x
  3. Step 3: Cross multiply
    278,501.88x = 417,760.92 × 68,139.76
  4. Step 4: Simplify right side
    278,501.88x = 28,466,128,826.18
  5. Step 5: Solve for x
    x = 28,466,128,826.18/278,501.88
  6. Step 6: Final answer
    x = 102,211.62

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1.5x scale

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.