Home / 272,215.20-408,405.68-139,188.90

Finding the Fourth Proportional to 272,215.20, 408,405.68 and 139,188.90

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Solution

The fourth proportional to 272,215.20, 408,405.68 and 139,188.90 is: 208,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,215.20 : 408,405.68 = 139,188.90 : x
  2. Step 2: Convert to fraction form
    272,215.20/408,405.68 = 139,188.90/x
  3. Step 3: Cross multiply
    272,215.20x = 408,405.68 × 139,188.90
  4. Step 4: Simplify right side
    272,215.20x = 56,845,537,352.95
  5. Step 5: Solve for x
    x = 56,845,537,352.95/272,215.20
  6. Step 6: Final answer
    x = 208,825.73

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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.