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Finding the Fourth Proportional to 57,182.40, 78,861.60 and 38,318.40

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Solution

The fourth proportional to 57,182.40, 78,861.60 and 38,318.40 is: 52,845.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,182.40 : 78,861.60 = 38,318.40 : x
  2. Step 2: Convert to fraction form
    57,182.40/78,861.60 = 38,318.40/x
  3. Step 3: Cross multiply
    57,182.40x = 78,861.60 × 38,318.40
  4. Step 4: Simplify right side
    57,182.40x = 3,021,850,333.44
  5. Step 5: Solve for x
    x = 3,021,850,333.44/57,182.40
  6. Step 6: Final answer
    x = 52,845.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.