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Finding the Fourth Proportional to 57,270.60, 85,885.30 and 19,820.50

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Solution

The fourth proportional to 57,270.60, 85,885.30 and 19,820.50 is: 29,723.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,270.60 : 85,885.30 = 19,820.50 : x
  2. Step 2: Convert to fraction form
    57,270.60/85,885.30 = 19,820.50/x
  3. Step 3: Cross multiply
    57,270.60x = 85,885.30 × 19,820.50
  4. Step 4: Simplify right side
    57,270.60x = 1,702,289,588.65
  5. Step 5: Solve for x
    x = 1,702,289,588.65/57,270.60
  6. Step 6: Final answer
    x = 29,723.62

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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.