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Finding the Fourth Proportional to 87,698.40, 131,566.80 and 43,346.40

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Solution

The fourth proportional to 87,698.40, 131,566.80 and 43,346.40 is: 65,029.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,698.40 : 131,566.80 = 43,346.40 : x
  2. Step 2: Convert to fraction form
    87,698.40/131,566.80 = 43,346.40/x
  3. Step 3: Cross multiply
    87,698.40x = 131,566.80 × 43,346.40
  4. Step 4: Simplify right side
    87,698.40x = 5,702,947,139.52
  5. Step 5: Solve for x
    x = 5,702,947,139.52/87,698.40
  6. Step 6: Final answer
    x = 65,029.09

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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.