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Finding the Fourth Proportional to 57,861.02, 86,801.80 and 20,442.80

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Solution

The fourth proportional to 57,861.02, 86,801.80 and 20,442.80 is: 30,667.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,861.02 : 86,801.80 = 20,442.80 : x
  2. Step 2: Convert to fraction form
    57,861.02/86,801.80 = 20,442.80/x
  3. Step 3: Cross multiply
    57,861.02x = 86,801.80 × 20,442.80
  4. Step 4: Simplify right side
    57,861.02x = 1,774,471,837.04
  5. Step 5: Solve for x
    x = 1,774,471,837.04/57,861.02
  6. Step 6: Final answer
    x = 30,667.83

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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.