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Finding the Fourth Proportional to 72,040.80, 108,158.40 and 57,266.40

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Solution

The fourth proportional to 72,040.80, 108,158.40 and 57,266.40 is: 85,976.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,040.80 : 108,158.40 = 57,266.40 : x
  2. Step 2: Convert to fraction form
    72,040.80/108,158.40 = 57,266.40/x
  3. Step 3: Cross multiply
    72,040.80x = 108,158.40 × 57,266.40
  4. Step 4: Simplify right side
    72,040.80x = 6,193,842,197.76
  5. Step 5: Solve for x
    x = 6,193,842,197.76/72,040.80
  6. Step 6: Final answer
    x = 85,976.87

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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.