Home / 281,329.41-421,981.15-81,645.78

Finding the Fourth Proportional to 281,329.41, 421,981.15 and 81,645.78

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Solution

The fourth proportional to 281,329.41, 421,981.15 and 81,645.78 is: 122,464.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,329.41 : 421,981.15 = 81,645.78 : x
  2. Step 2: Convert to fraction form
    281,329.41/421,981.15 = 81,645.78/x
  3. Step 3: Cross multiply
    281,329.41x = 421,981.15 × 81,645.78
  4. Step 4: Simplify right side
    281,329.41x = 34,452,980,137.05
  5. Step 5: Solve for x
    x = 34,452,980,137.05/281,329.41
  6. Step 6: Final answer
    x = 122,464.91

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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.