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Finding the Fourth Proportional to 77,000.60, 115,443.30 and 41,979.80

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Solution

The fourth proportional to 77,000.60, 115,443.30 and 41,979.80 is: 62,938.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,000.60 : 115,443.30 = 41,979.80 : x
  2. Step 2: Convert to fraction form
    77,000.60/115,443.30 = 41,979.80/x
  3. Step 3: Cross multiply
    77,000.60x = 115,443.30 × 41,979.80
  4. Step 4: Simplify right side
    77,000.60x = 4,846,286,645.34
  5. Step 5: Solve for x
    x = 4,846,286,645.34/77,000.60
  6. Step 6: Final answer
    x = 62,938.30

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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.