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Finding the Fourth Proportional to 77,857.29, 107,420.83 and 43,853.89

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Solution

The fourth proportional to 77,857.29, 107,420.83 and 43,853.89 is: 60,505.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,857.29 : 107,420.83 = 43,853.89 : x
  2. Step 2: Convert to fraction form
    77,857.29/107,420.83 = 43,853.89/x
  3. Step 3: Cross multiply
    77,857.29x = 107,420.83 × 43,853.89
  4. Step 4: Simplify right side
    77,857.29x = 4,710,821,262.53
  5. Step 5: Solve for x
    x = 4,710,821,262.53/77,857.29
  6. Step 6: Final answer
    x = 60,505.85

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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.