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Finding the Fourth Proportional to 77,262.88, 106,619.88 and 43,728.88

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Solution

The fourth proportional to 77,262.88, 106,619.88 and 43,728.88 is: 60,344.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,262.88 : 106,619.88 = 43,728.88 : x
  2. Step 2: Convert to fraction form
    77,262.88/106,619.88 = 43,728.88/x
  3. Step 3: Cross multiply
    77,262.88x = 106,619.88 × 43,728.88
  4. Step 4: Simplify right side
    77,262.88x = 4,662,367,938.13
  5. Step 5: Solve for x
    x = 4,662,367,938.13/77,262.88
  6. Step 6: Final answer
    x = 60,344.22

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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.