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Finding the Fourth Proportional to 278,085.69, 417,252.60 and 128,245.56

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Solution

The fourth proportional to 278,085.69, 417,252.60 and 128,245.56 is: 192,425.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,085.69 : 417,252.60 = 128,245.56 : x
  2. Step 2: Convert to fraction form
    278,085.69/417,252.60 = 128,245.56/x
  3. Step 3: Cross multiply
    278,085.69x = 417,252.60 × 128,245.56
  4. Step 4: Simplify right side
    278,085.69x = 53,510,793,348.46
  5. Step 5: Solve for x
    x = 53,510,793,348.46/278,085.69
  6. Step 6: Final answer
    x = 192,425.56

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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.