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Finding the Fourth Proportional to 57,305.50, 85,948.81 and 15,188.20

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Solution

The fourth proportional to 57,305.50, 85,948.81 and 15,188.20 is: 22,779.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,305.50 : 85,948.81 = 15,188.20 : x
  2. Step 2: Convert to fraction form
    57,305.50/85,948.81 = 15,188.20/x
  3. Step 3: Cross multiply
    57,305.50x = 85,948.81 × 15,188.20
  4. Step 4: Simplify right side
    57,305.50x = 1,305,407,716.04
  5. Step 5: Solve for x
    x = 1,305,407,716.04/57,305.50
  6. Step 6: Final answer
    x = 22,779.80

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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.