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Finding the Fourth Proportional to 57,015.70, 85,488.01 and 21,947.15

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Solution

The fourth proportional to 57,015.70, 85,488.01 and 21,947.15 is: 32,907.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,015.70 : 85,488.01 = 21,947.15 : x
  2. Step 2: Convert to fraction form
    57,015.70/85,488.01 = 21,947.15/x
  3. Step 3: Cross multiply
    57,015.70x = 85,488.01 × 21,947.15
  4. Step 4: Simplify right side
    57,015.70x = 1,876,218,337.52
  5. Step 5: Solve for x
    x = 1,876,218,337.52/57,015.70
  6. Step 6: Final answer
    x = 32,907.05

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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.