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Finding the Fourth Proportional to 57,062.72, 85,608.94 and 21,990.80

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Solution

The fourth proportional to 57,062.72, 85,608.94 and 21,990.80 is: 32,991.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,062.72 : 85,608.94 = 21,990.80 : x
  2. Step 2: Convert to fraction form
    57,062.72/85,608.94 = 21,990.80/x
  3. Step 3: Cross multiply
    57,062.72x = 85,608.94 × 21,990.80
  4. Step 4: Simplify right side
    57,062.72x = 1,882,609,077.75
  5. Step 5: Solve for x
    x = 1,882,609,077.75/57,062.72
  6. Step 6: Final answer
    x = 32,991.93

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1.5x scale

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.