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Finding the Fourth Proportional to 272,895.40, 409,343.10 and 85,906.90

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Solution

The fourth proportional to 272,895.40, 409,343.10 and 85,906.90 is: 128,860.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,895.40 : 409,343.10 = 85,906.90 : x
  2. Step 2: Convert to fraction form
    272,895.40/409,343.10 = 85,906.90/x
  3. Step 3: Cross multiply
    272,895.40x = 409,343.10 × 85,906.90
  4. Step 4: Simplify right side
    272,895.40x = 35,165,396,757.39
  5. Step 5: Solve for x
    x = 35,165,396,757.39/272,895.40
  6. Step 6: Final answer
    x = 128,860.35

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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.