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Finding the Fourth Proportional to 272,929.80, 409,452.30 and 85,960.20

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Solution

The fourth proportional to 272,929.80, 409,452.30 and 85,960.20 is: 128,958.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,929.80 : 409,452.30 = 85,960.20 : x
  2. Step 2: Convert to fraction form
    272,929.80/409,452.30 = 85,960.20/x
  3. Step 3: Cross multiply
    272,929.80x = 409,452.30 × 85,960.20
  4. Step 4: Simplify right side
    272,929.80x = 35,196,601,598.46
  5. Step 5: Solve for x
    x = 35,196,601,598.46/272,929.80
  6. Step 6: Final answer
    x = 128,958.44

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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.