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Finding the Fourth Proportional to 57,318.40, 85,977.60 and 53,171.20

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Solution

The fourth proportional to 57,318.40, 85,977.60 and 53,171.20 is: 79,756.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,318.40 : 85,977.60 = 53,171.20 : x
  2. Step 2: Convert to fraction form
    57,318.40/85,977.60 = 53,171.20/x
  3. Step 3: Cross multiply
    57,318.40x = 85,977.60 × 53,171.20
  4. Step 4: Simplify right side
    57,318.40x = 4,571,532,165.12
  5. Step 5: Solve for x
    x = 4,571,532,165.12/57,318.40
  6. Step 6: Final answer
    x = 79,756.80

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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.