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Finding the Fourth Proportional to 115,029.62, 158,605.05 and 78,748.52

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Solution

The fourth proportional to 115,029.62, 158,605.05 and 78,748.52 is: 108,579.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,029.62 : 158,605.05 = 78,748.52 : x
  2. Step 2: Convert to fraction form
    115,029.62/158,605.05 = 78,748.52/x
  3. Step 3: Cross multiply
    115,029.62x = 158,605.05 × 78,748.52
  4. Step 4: Simplify right side
    115,029.62x = 12,489,912,952.03
  5. Step 5: Solve for x
    x = 12,489,912,952.03/115,029.62
  6. Step 6: Final answer
    x = 108,579.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.