Home / 57,211.20-85,816.80-52,142.40

Finding the Fourth Proportional to 57,211.20, 85,816.80 and 52,142.40

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Solution

The fourth proportional to 57,211.20, 85,816.80 and 52,142.40 is: 78,213.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,211.20 : 85,816.80 = 52,142.40 : x
  2. Step 2: Convert to fraction form
    57,211.20/85,816.80 = 52,142.40/x
  3. Step 3: Cross multiply
    57,211.20x = 85,816.80 × 52,142.40
  4. Step 4: Simplify right side
    57,211.20x = 4,474,693,912.32
  5. Step 5: Solve for x
    x = 4,474,693,912.32/57,211.20
  6. Step 6: Final answer
    x = 78,213.60

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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.