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Finding the Fourth Proportional to 55,561.56, 83,319.88 and 20,493.40

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Solution

The fourth proportional to 55,561.56, 83,319.88 and 20,493.40 is: 30,731.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,561.56 : 83,319.88 = 20,493.40 : x
  2. Step 2: Convert to fraction form
    55,561.56/83,319.88 = 20,493.40/x
  3. Step 3: Cross multiply
    55,561.56x = 83,319.88 × 20,493.40
  4. Step 4: Simplify right side
    55,561.56x = 1,707,507,628.79
  5. Step 5: Solve for x
    x = 1,707,507,628.79/55,561.56
  6. Step 6: Final answer
    x = 30,731.82

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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.