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Finding the Fourth Proportional to 272,403.36, 408,670.48 and 85,414.88

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Solution

The fourth proportional to 272,403.36, 408,670.48 and 85,414.88 is: 128,142.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,403.36 : 408,670.48 = 85,414.88 : x
  2. Step 2: Convert to fraction form
    272,403.36/408,670.48 = 85,414.88/x
  3. Step 3: Cross multiply
    272,403.36x = 408,670.48 × 85,414.88
  4. Step 4: Simplify right side
    272,403.36x = 34,906,540,008.74
  5. Step 5: Solve for x
    x = 34,906,540,008.74/272,403.36
  6. Step 6: Final answer
    x = 128,142.84

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1.5x scale

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.