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Finding the Fourth Proportional to 57,856.80, 86,720.40 and 32,908.80

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Solution

The fourth proportional to 57,856.80, 86,720.40 and 32,908.80 is: 49,326.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,856.80 : 86,720.40 = 32,908.80 : x
  2. Step 2: Convert to fraction form
    57,856.80/86,720.40 = 32,908.80/x
  3. Step 3: Cross multiply
    57,856.80x = 86,720.40 × 32,908.80
  4. Step 4: Simplify right side
    57,856.80x = 2,853,864,299.52
  5. Step 5: Solve for x
    x = 2,853,864,299.52/57,856.80
  6. Step 6: Final answer
    x = 49,326.34

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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.