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Finding the Fourth Proportional to 57,397.44, 86,091.30 and 19,947.90

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Solution

The fourth proportional to 57,397.44, 86,091.30 and 19,947.90 is: 29,920.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,397.44 : 86,091.30 = 19,947.90 : x
  2. Step 2: Convert to fraction form
    57,397.44/86,091.30 = 19,947.90/x
  3. Step 3: Cross multiply
    57,397.44x = 86,091.30 × 19,947.90
  4. Step 4: Simplify right side
    57,397.44x = 1,717,340,643.27
  5. Step 5: Solve for x
    x = 1,717,340,643.27/57,397.44
  6. Step 6: Final answer
    x = 29,920.16

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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.