Home / 278,145.45-417,218.18-67,785.21

Finding the Fourth Proportional to 278,145.45, 417,218.18 and 67,785.21

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Solution

The fourth proportional to 278,145.45, 417,218.18 and 67,785.21 is: 101,677.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,145.45 : 417,218.18 = 67,785.21 : x
  2. Step 2: Convert to fraction form
    278,145.45/417,218.18 = 67,785.21/x
  3. Step 3: Cross multiply
    278,145.45x = 417,218.18 × 67,785.21
  4. Step 4: Simplify right side
    278,145.45x = 28,281,221,608.19
  5. Step 5: Solve for x
    x = 28,281,221,608.19/278,145.45
  6. Step 6: Final answer
    x = 101,677.82

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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.