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Finding the Fourth Proportional to 103,995.90, 155,944.44 and 51,343.88

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Solution

The fourth proportional to 103,995.90, 155,944.44 and 51,343.88 is: 76,991.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,995.90 : 155,944.44 = 51,343.88 : x
  2. Step 2: Convert to fraction form
    103,995.90/155,944.44 = 51,343.88/x
  3. Step 3: Cross multiply
    103,995.90x = 155,944.44 × 51,343.88
  4. Step 4: Simplify right side
    103,995.90x = 8,006,791,834.31
  5. Step 5: Solve for x
    x = 8,006,791,834.31/103,995.90
  6. Step 6: Final answer
    x = 76,991.42

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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.