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Finding the Fourth Proportional to 77,380.80, 106,685.55 and 50,108.40

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Solution

The fourth proportional to 77,380.80, 106,685.55 and 50,108.40 is: 69,084.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,380.80 : 106,685.55 = 50,108.40 : x
  2. Step 2: Convert to fraction form
    77,380.80/106,685.55 = 50,108.40/x
  3. Step 3: Cross multiply
    77,380.80x = 106,685.55 × 50,108.40
  4. Step 4: Simplify right side
    77,380.80x = 5,345,842,213.62
  5. Step 5: Solve for x
    x = 5,345,842,213.62/77,380.80
  6. Step 6: Final answer
    x = 69,084.87

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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.