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Finding the Fourth Proportional to 87,420.80, 131,150.48 and 51,914.40

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Solution

The fourth proportional to 87,420.80, 131,150.48 and 51,914.40 is: 77,883.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,420.80 : 131,150.48 = 51,914.40 : x
  2. Step 2: Convert to fraction form
    87,420.80/131,150.48 = 51,914.40/x
  3. Step 3: Cross multiply
    87,420.80x = 131,150.48 × 51,914.40
  4. Step 4: Simplify right side
    87,420.80x = 6,808,598,478.91
  5. Step 5: Solve for x
    x = 6,808,598,478.91/87,420.80
  6. Step 6: Final answer
    x = 77,883.05

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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.