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Finding the Fourth Proportional to 77,191.73, 115,727.10 and 30,479.57

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Solution

The fourth proportional to 77,191.73, 115,727.10 and 30,479.57 is: 45,695.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,191.73 : 115,727.10 = 30,479.57 : x
  2. Step 2: Convert to fraction form
    77,191.73/115,727.10 = 30,479.57/x
  3. Step 3: Cross multiply
    77,191.73x = 115,727.10 × 30,479.57
  4. Step 4: Simplify right side
    77,191.73x = 3,527,311,666.71
  5. Step 5: Solve for x
    x = 3,527,311,666.71/77,191.73
  6. Step 6: Final answer
    x = 45,695.46

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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.