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Finding the Fourth Proportional to 205,402.20, 308,103.30 and 57,658.20

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Solution

The fourth proportional to 205,402.20, 308,103.30 and 57,658.20 is: 86,487.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,402.20 : 308,103.30 = 57,658.20 : x
  2. Step 2: Convert to fraction form
    205,402.20/308,103.30 = 57,658.20/x
  3. Step 3: Cross multiply
    205,402.20x = 308,103.30 × 57,658.20
  4. Step 4: Simplify right side
    205,402.20x = 17,764,681,692.06
  5. Step 5: Solve for x
    x = 17,764,681,692.06/205,402.20
  6. Step 6: Final answer
    x = 86,487.30

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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.