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Finding the Fourth Proportional to 274,656.60, 411,821.28 and 85,060.80

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Solution

The fourth proportional to 274,656.60, 411,821.28 and 85,060.80 is: 127,540.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,656.60 : 411,821.28 = 85,060.80 : x
  2. Step 2: Convert to fraction form
    274,656.60/411,821.28 = 85,060.80/x
  3. Step 3: Cross multiply
    274,656.60x = 411,821.28 × 85,060.80
  4. Step 4: Simplify right side
    274,656.60x = 35,029,847,533.82
  5. Step 5: Solve for x
    x = 35,029,847,533.82/274,656.60
  6. Step 6: Final answer
    x = 127,540.53

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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.