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Finding the Fourth Proportional to 87,679.60, 131,605.80 and 43,356.40

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Solution

The fourth proportional to 87,679.60, 131,605.80 and 43,356.40 is: 65,077.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,679.60 : 131,605.80 = 43,356.40 : x
  2. Step 2: Convert to fraction form
    87,679.60/131,605.80 = 43,356.40/x
  3. Step 3: Cross multiply
    87,679.60x = 131,605.80 × 43,356.40
  4. Step 4: Simplify right side
    87,679.60x = 5,705,953,707.12
  5. Step 5: Solve for x
    x = 5,705,953,707.12/87,679.60
  6. Step 6: Final answer
    x = 65,077.32

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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.