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Finding the Fourth Proportional to 272,043.40, 408,199.20 and 122,389.60

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Solution

The fourth proportional to 272,043.40, 408,199.20 and 122,389.60 is: 183,644.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,043.40 : 408,199.20 = 122,389.60 : x
  2. Step 2: Convert to fraction form
    272,043.40/408,199.20 = 122,389.60/x
  3. Step 3: Cross multiply
    272,043.40x = 408,199.20 × 122,389.60
  4. Step 4: Simplify right side
    272,043.40x = 49,959,336,808.32
  5. Step 5: Solve for x
    x = 49,959,336,808.32/272,043.40
  6. Step 6: Final answer
    x = 183,644.73

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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.