Home / 278,005.10-417,007.65-100,517.90

Finding the Fourth Proportional to 278,005.10, 417,007.65 and 100,517.90

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Solution

The fourth proportional to 278,005.10, 417,007.65 and 100,517.90 is: 150,776.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,005.10 : 417,007.65 = 100,517.90 : x
  2. Step 2: Convert to fraction form
    278,005.10/417,007.65 = 100,517.90/x
  3. Step 3: Cross multiply
    278,005.10x = 417,007.65 × 100,517.90
  4. Step 4: Simplify right side
    278,005.10x = 41,916,733,261.94
  5. Step 5: Solve for x
    x = 41,916,733,261.94/278,005.10
  6. Step 6: Final answer
    x = 150,776.85

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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.