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Finding the Fourth Proportional to 73,912.42, 110,856.48 and 21,307.78

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Solution

The fourth proportional to 73,912.42, 110,856.48 and 21,307.78 is: 31,958.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,912.42 : 110,856.48 = 21,307.78 : x
  2. Step 2: Convert to fraction form
    73,912.42/110,856.48 = 21,307.78/x
  3. Step 3: Cross multiply
    73,912.42x = 110,856.48 × 21,307.78
  4. Step 4: Simplify right side
    73,912.42x = 2,362,105,487.41
  5. Step 5: Solve for x
    x = 2,362,105,487.41/73,912.42
  6. Step 6: Final answer
    x = 31,958.17

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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.