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Finding the Fourth Proportional to 272,221.60, 408,040.80 and 122,436.40

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Solution

The fourth proportional to 272,221.60, 408,040.80 and 122,436.40 is: 183,523.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,221.60 : 408,040.80 = 122,436.40 : x
  2. Step 2: Convert to fraction form
    272,221.60/408,040.80 = 122,436.40/x
  3. Step 3: Cross multiply
    272,221.60x = 408,040.80 × 122,436.40
  4. Step 4: Simplify right side
    272,221.60x = 49,959,046,605.12
  5. Step 5: Solve for x
    x = 49,959,046,605.12/272,221.60
  6. Step 6: Final answer
    x = 183,523.45

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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.