Home / 77,658.20-107,115.63-50,385.56

Finding the Fourth Proportional to 77,658.20, 107,115.63 and 50,385.56

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Solution

The fourth proportional to 77,658.20, 107,115.63 and 50,385.56 is: 69,497.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,658.20 : 107,115.63 = 50,385.56 : x
  2. Step 2: Convert to fraction form
    77,658.20/107,115.63 = 50,385.56/x
  3. Step 3: Cross multiply
    77,658.20x = 107,115.63 × 50,385.56
  4. Step 4: Simplify right side
    77,658.20x = 5,397,080,868.41
  5. Step 5: Solve for x
    x = 5,397,080,868.41/77,658.20
  6. Step 6: Final answer
    x = 69,497.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.