Home / 212,631.76-318,789.42-92,665.92

Finding the Fourth Proportional to 212,631.76, 318,789.42 and 92,665.92

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Solution

The fourth proportional to 212,631.76, 318,789.42 and 92,665.92 is: 138,929.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,631.76 : 318,789.42 = 92,665.92 : x
  2. Step 2: Convert to fraction form
    212,631.76/318,789.42 = 92,665.92/x
  3. Step 3: Cross multiply
    212,631.76x = 318,789.42 × 92,665.92
  4. Step 4: Simplify right side
    212,631.76x = 29,540,916,259.78
  5. Step 5: Solve for x
    x = 29,540,916,259.78/212,631.76
  6. Step 6: Final answer
    x = 138,929.93

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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.