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Finding the Fourth Proportional to 272,428.40, 408,642.60 and 122,720.96

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Solution

The fourth proportional to 272,428.40, 408,642.60 and 122,720.96 is: 184,081.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,428.40 : 408,642.60 = 122,720.96 : x
  2. Step 2: Convert to fraction form
    272,428.40/408,642.60 = 122,720.96/x
  3. Step 3: Cross multiply
    272,428.40x = 408,642.60 × 122,720.96
  4. Step 4: Simplify right side
    272,428.40x = 50,149,012,168.90
  5. Step 5: Solve for x
    x = 50,149,012,168.90/272,428.40
  6. Step 6: Final answer
    x = 184,081.44

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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.