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Finding the Fourth Proportional to 77,754.50, 107,310.66 and 43,775.72

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Solution

The fourth proportional to 77,754.50, 107,310.66 and 43,775.72 is: 60,415.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,754.50 : 107,310.66 = 43,775.72 : x
  2. Step 2: Convert to fraction form
    77,754.50/107,310.66 = 43,775.72/x
  3. Step 3: Cross multiply
    77,754.50x = 107,310.66 × 43,775.72
  4. Step 4: Simplify right side
    77,754.50x = 4,697,601,405.18
  5. Step 5: Solve for x
    x = 4,697,601,405.18/77,754.50
  6. Step 6: Final answer
    x = 60,415.81

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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.