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Finding the Fourth Proportional to 45,874.80, 68,747.40 and 28,292.40

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Solution

The fourth proportional to 45,874.80, 68,747.40 and 28,292.40 is: 42,398.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,874.80 : 68,747.40 = 28,292.40 : x
  2. Step 2: Convert to fraction form
    45,874.80/68,747.40 = 28,292.40/x
  3. Step 3: Cross multiply
    45,874.80x = 68,747.40 × 28,292.40
  4. Step 4: Simplify right side
    45,874.80x = 1,945,028,939.76
  5. Step 5: Solve for x
    x = 1,945,028,939.76/45,874.80
  6. Step 6: Final answer
    x = 42,398.64

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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.