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Finding the Fourth Proportional to 272,486.94, 408,796.05 and 85,498.44

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Solution

The fourth proportional to 272,486.94, 408,796.05 and 85,498.44 is: 128,268.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,486.94 : 408,796.05 = 85,498.44 : x
  2. Step 2: Convert to fraction form
    272,486.94/408,796.05 = 85,498.44/x
  3. Step 3: Cross multiply
    272,486.94x = 408,796.05 × 85,498.44
  4. Step 4: Simplify right side
    272,486.94x = 34,951,423,531.17
  5. Step 5: Solve for x
    x = 34,951,423,531.17/272,486.94
  6. Step 6: Final answer
    x = 128,268.25

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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.