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Finding the Fourth Proportional to 77,674.28, 107,147.22 and 53,814.92

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Solution

The fourth proportional to 77,674.28, 107,147.22 and 53,814.92 is: 74,234.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,674.28 : 107,147.22 = 53,814.92 : x
  2. Step 2: Convert to fraction form
    77,674.28/107,147.22 = 53,814.92/x
  3. Step 3: Cross multiply
    77,674.28x = 107,147.22 × 53,814.92
  4. Step 4: Simplify right side
    77,674.28x = 5,766,119,072.52
  5. Step 5: Solve for x
    x = 5,766,119,072.52/77,674.28
  6. Step 6: Final answer
    x = 74,234.60

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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.