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Finding the Fourth Proportional to 272,220.60, 408,039.30 and 122,435.40

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Solution

The fourth proportional to 272,220.60, 408,039.30 and 122,435.40 is: 183,521.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,220.60 : 408,039.30 = 122,435.40 : x
  2. Step 2: Convert to fraction form
    272,220.60/408,039.30 = 122,435.40/x
  3. Step 3: Cross multiply
    272,220.60x = 408,039.30 × 122,435.40
  4. Step 4: Simplify right side
    272,220.60x = 49,958,454,911.22
  5. Step 5: Solve for x
    x = 49,958,454,911.22/272,220.60
  6. Step 6: Final answer
    x = 183,521.95

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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.