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Finding the Fourth Proportional to 55,872.80, 77,105.80 and 30,380.64

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Solution

The fourth proportional to 55,872.80, 77,105.80 and 30,380.64 is: 41,926.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,872.80 : 77,105.80 = 30,380.64 : x
  2. Step 2: Convert to fraction form
    55,872.80/77,105.80 = 30,380.64/x
  3. Step 3: Cross multiply
    55,872.80x = 77,105.80 × 30,380.64
  4. Step 4: Simplify right side
    55,872.80x = 2,342,523,551.71
  5. Step 5: Solve for x
    x = 2,342,523,551.71/55,872.80
  6. Step 6: Final answer
    x = 41,926.01

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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.