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Finding the Fourth Proportional to 55,768.80, 83,750.40 and 54,019.20

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Solution

The fourth proportional to 55,768.80, 83,750.40 and 54,019.20 is: 81,122.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,768.80 : 83,750.40 = 54,019.20 : x
  2. Step 2: Convert to fraction form
    55,768.80/83,750.40 = 54,019.20/x
  3. Step 3: Cross multiply
    55,768.80x = 83,750.40 × 54,019.20
  4. Step 4: Simplify right side
    55,768.80x = 4,524,129,607.68
  5. Step 5: Solve for x
    x = 4,524,129,607.68/55,768.80
  6. Step 6: Final answer
    x = 81,122.95

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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.