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Finding the Fourth Proportional to 55,760.88, 83,619.50 and 20,213.76

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Solution

The fourth proportional to 55,760.88, 83,619.50 and 20,213.76 is: 30,312.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,760.88 : 83,619.50 = 20,213.76 : x
  2. Step 2: Convert to fraction form
    55,760.88/83,619.50 = 20,213.76/x
  3. Step 3: Cross multiply
    55,760.88x = 83,619.50 × 20,213.76
  4. Step 4: Simplify right side
    55,760.88x = 1,690,264,504.32
  5. Step 5: Solve for x
    x = 1,690,264,504.32/55,760.88
  6. Step 6: Final answer
    x = 30,312.73

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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.