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Finding the Fourth Proportional to 272,026.60, 408,078.30 and 85,018.60

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Solution

The fourth proportional to 272,026.60, 408,078.30 and 85,018.60 is: 127,539.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,026.60 : 408,078.30 = 85,018.60 : x
  2. Step 2: Convert to fraction form
    272,026.60/408,078.30 = 85,018.60/x
  3. Step 3: Cross multiply
    272,026.60x = 408,078.30 × 85,018.60
  4. Step 4: Simplify right side
    272,026.60x = 34,694,245,756.38
  5. Step 5: Solve for x
    x = 34,694,245,756.38/272,026.60
  6. Step 6: Final answer
    x = 127,539.90

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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.