Home / 278,880.10-418,320.15-68,515.30

Finding the Fourth Proportional to 278,880.10, 418,320.15 and 68,515.30

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Solution

The fourth proportional to 278,880.10, 418,320.15 and 68,515.30 is: 102,772.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,880.10 : 418,320.15 = 68,515.30 : x
  2. Step 2: Convert to fraction form
    278,880.10/418,320.15 = 68,515.30/x
  3. Step 3: Cross multiply
    278,880.10x = 418,320.15 × 68,515.30
  4. Step 4: Simplify right side
    278,880.10x = 28,661,330,573.30
  5. Step 5: Solve for x
    x = 28,661,330,573.30/278,880.10
  6. Step 6: Final answer
    x = 102,772.95

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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.