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Finding the Fourth Proportional to 57,044.80, 78,612.96 and 49,579.84

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Solution

The fourth proportional to 57,044.80, 78,612.96 and 49,579.84 is: 68,325.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,044.80 : 78,612.96 = 49,579.84 : x
  2. Step 2: Convert to fraction form
    57,044.80/78,612.96 = 49,579.84/x
  3. Step 3: Cross multiply
    57,044.80x = 78,612.96 × 49,579.84
  4. Step 4: Simplify right side
    57,044.80x = 3,897,617,978.73
  5. Step 5: Solve for x
    x = 3,897,617,978.73/57,044.80
  6. Step 6: Final answer
    x = 68,325.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.