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Finding the Fourth Proportional to 55,871.75, 83,860.29 and 20,367.40

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Solution

The fourth proportional to 55,871.75, 83,860.29 and 20,367.40 is: 30,570.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,871.75 : 83,860.29 = 20,367.40 : x
  2. Step 2: Convert to fraction form
    55,871.75/83,860.29 = 20,367.40/x
  3. Step 3: Cross multiply
    55,871.75x = 83,860.29 × 20,367.40
  4. Step 4: Simplify right side
    55,871.75x = 1,708,015,960.85
  5. Step 5: Solve for x
    x = 1,708,015,960.85/55,871.75
  6. Step 6: Final answer
    x = 30,570.30

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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.