Home / 128,542.20-192,732.30-53,714.40

Finding the Fourth Proportional to 128,542.20, 192,732.30 and 53,714.40

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Solution

The fourth proportional to 128,542.20, 192,732.30 and 53,714.40 is: 80,537.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,542.20 : 192,732.30 = 53,714.40 : x
  2. Step 2: Convert to fraction form
    128,542.20/192,732.30 = 53,714.40/x
  3. Step 3: Cross multiply
    128,542.20x = 192,732.30 × 53,714.40
  4. Step 4: Simplify right side
    128,542.20x = 10,352,499,855.12
  5. Step 5: Solve for x
    x = 10,352,499,855.12/128,542.20
  6. Step 6: Final answer
    x = 80,537.75

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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.