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Finding the Fourth Proportional to 272,805.80, 409,208.70 and 85,874.60

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Solution

The fourth proportional to 272,805.80, 409,208.70 and 85,874.60 is: 128,811.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,805.80 : 409,208.70 = 85,874.60 : x
  2. Step 2: Convert to fraction form
    272,805.80/409,208.70 = 85,874.60/x
  3. Step 3: Cross multiply
    272,805.80x = 409,208.70 × 85,874.60
  4. Step 4: Simplify right side
    272,805.80x = 35,140,633,429.02
  5. Step 5: Solve for x
    x = 35,140,633,429.02/272,805.80
  6. Step 6: Final answer
    x = 128,811.90

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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.