Home / 281,328.41-421,979.65-81,644.78

Finding the Fourth Proportional to 281,328.41, 421,979.65 and 81,644.78

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Solution

The fourth proportional to 281,328.41, 421,979.65 and 81,644.78 is: 122,463.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,328.41 : 421,979.65 = 81,644.78 : x
  2. Step 2: Convert to fraction form
    281,328.41/421,979.65 = 81,644.78/x
  3. Step 3: Cross multiply
    281,328.41x = 421,979.65 × 81,644.78
  4. Step 4: Simplify right side
    281,328.41x = 34,452,435,688.73
  5. Step 5: Solve for x
    x = 34,452,435,688.73/281,328.41
  6. Step 6: Final answer
    x = 122,463.41

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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.