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Finding the Fourth Proportional to 61,094.87, 91,656.65 and 18,972.78

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Solution

The fourth proportional to 61,094.87, 91,656.65 and 18,972.78 is: 28,463.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,094.87 : 91,656.65 = 18,972.78 : x
  2. Step 2: Convert to fraction form
    61,094.87/91,656.65 = 18,972.78/x
  3. Step 3: Cross multiply
    61,094.87x = 91,656.65 × 18,972.78
  4. Step 4: Simplify right side
    61,094.87x = 1,738,981,361.12
  5. Step 5: Solve for x
    x = 1,738,981,361.12/61,094.87
  6. Step 6: Final answer
    x = 28,463.63

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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.