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Finding the Fourth Proportional to 87,008.40, 130,339.80 and 51,843.60

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Solution

The fourth proportional to 87,008.40, 130,339.80 and 51,843.60 is: 77,662.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,008.40 : 130,339.80 = 51,843.60 : x
  2. Step 2: Convert to fraction form
    87,008.40/130,339.80 = 51,843.60/x
  3. Step 3: Cross multiply
    87,008.40x = 130,339.80 × 51,843.60
  4. Step 4: Simplify right side
    87,008.40x = 6,757,284,455.28
  5. Step 5: Solve for x
    x = 6,757,284,455.28/87,008.40
  6. Step 6: Final answer
    x = 77,662.44

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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.