Home / 280,928.58-421,329.69-81,204.45

Finding the Fourth Proportional to 280,928.58, 421,329.69 and 81,204.45

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Solution

The fourth proportional to 280,928.58, 421,329.69 and 81,204.45 is: 121,788.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,928.58 : 421,329.69 = 81,204.45 : x
  2. Step 2: Convert to fraction form
    280,928.58/421,329.69 = 81,204.45/x
  3. Step 3: Cross multiply
    280,928.58x = 421,329.69 × 81,204.45
  4. Step 4: Simplify right side
    280,928.58x = 34,213,845,745.12
  5. Step 5: Solve for x
    x = 34,213,845,745.12/280,928.58
  6. Step 6: Final answer
    x = 121,788.41

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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.