Home / 278,721.45-418,246.20-101,246.40

Finding the Fourth Proportional to 278,721.45, 418,246.20 and 101,246.40

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Solution

The fourth proportional to 278,721.45, 418,246.20 and 101,246.40 is: 151,929.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,721.45 : 418,246.20 = 101,246.40 : x
  2. Step 2: Convert to fraction form
    278,721.45/418,246.20 = 101,246.40/x
  3. Step 3: Cross multiply
    278,721.45x = 418,246.20 × 101,246.40
  4. Step 4: Simplify right side
    278,721.45x = 42,345,922,063.68
  5. Step 5: Solve for x
    x = 42,345,922,063.68/278,721.45
  6. Step 6: Final answer
    x = 151,929.18

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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.