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Finding the Fourth Proportional to 77,279.67, 106,647.30 and 43,287.89

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Solution

The fourth proportional to 77,279.67, 106,647.30 and 43,287.89 is: 59,738.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,279.67 : 106,647.30 = 43,287.89 : x
  2. Step 2: Convert to fraction form
    77,279.67/106,647.30 = 43,287.89/x
  3. Step 3: Cross multiply
    77,279.67x = 106,647.30 × 43,287.89
  4. Step 4: Simplify right side
    77,279.67x = 4,616,536,057.96
  5. Step 5: Solve for x
    x = 4,616,536,057.96/77,279.67
  6. Step 6: Final answer
    x = 59,738.04

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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.