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Finding the Fourth Proportional to 57,752.60, 86,631.60 and 18,312.80

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Solution

The fourth proportional to 57,752.60, 86,631.60 and 18,312.80 is: 27,470.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,752.60 : 86,631.60 = 18,312.80 : x
  2. Step 2: Convert to fraction form
    57,752.60/86,631.60 = 18,312.80/x
  3. Step 3: Cross multiply
    57,752.60x = 86,631.60 × 18,312.80
  4. Step 4: Simplify right side
    57,752.60x = 1,586,467,164.48
  5. Step 5: Solve for x
    x = 1,586,467,164.48/57,752.60
  6. Step 6: Final answer
    x = 27,470.06

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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.