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Finding the Fourth Proportional to 137,231.20, 205,846.80 and 54,114.40

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Solution

The fourth proportional to 137,231.20, 205,846.80 and 54,114.40 is: 81,171.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,231.20 : 205,846.80 = 54,114.40 : x
  2. Step 2: Convert to fraction form
    137,231.20/205,846.80 = 54,114.40/x
  3. Step 3: Cross multiply
    137,231.20x = 205,846.80 × 54,114.40
  4. Step 4: Simplify right side
    137,231.20x = 11,139,276,073.92
  5. Step 5: Solve for x
    x = 11,139,276,073.92/137,231.20
  6. Step 6: Final answer
    x = 81,171.60

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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.