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Finding the Fourth Proportional to 272,861.40, 409,292.10 and 85,872.90

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Solution

The fourth proportional to 272,861.40, 409,292.10 and 85,872.90 is: 128,809.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,861.40 : 409,292.10 = 85,872.90 : x
  2. Step 2: Convert to fraction form
    272,861.40/409,292.10 = 85,872.90/x
  3. Step 3: Cross multiply
    272,861.40x = 409,292.10 × 85,872.90
  4. Step 4: Simplify right side
    272,861.40x = 35,147,099,574.09
  5. Step 5: Solve for x
    x = 35,147,099,574.09/272,861.40
  6. Step 6: Final answer
    x = 128,809.35

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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.