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Finding the Fourth Proportional to 57,981.60, 86,871.60 and 26,752.80

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Solution

The fourth proportional to 57,981.60, 86,871.60 and 26,752.80 is: 40,082.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,981.60 : 86,871.60 = 26,752.80 : x
  2. Step 2: Convert to fraction form
    57,981.60/86,871.60 = 26,752.80/x
  3. Step 3: Cross multiply
    57,981.60x = 86,871.60 × 26,752.80
  4. Step 4: Simplify right side
    57,981.60x = 2,324,058,540.48
  5. Step 5: Solve for x
    x = 2,324,058,540.48/57,981.60
  6. Step 6: Final answer
    x = 40,082.69

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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.