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Finding the Fourth Proportional to 61,268.67, 91,921.46 and 21,820.65

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Solution

The fourth proportional to 61,268.67, 91,921.46 and 21,820.65 is: 32,737.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,268.67 : 91,921.46 = 21,820.65 : x
  2. Step 2: Convert to fraction form
    61,268.67/91,921.46 = 21,820.65/x
  3. Step 3: Cross multiply
    61,268.67x = 91,921.46 × 21,820.65
  4. Step 4: Simplify right side
    61,268.67x = 2,005,786,060.70
  5. Step 5: Solve for x
    x = 2,005,786,060.70/61,268.67
  6. Step 6: Final answer
    x = 32,737.55

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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.