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Finding the Fourth Proportional to 272,613.54, 408,964.69 and 80,507.40

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Solution

The fourth proportional to 272,613.54, 408,964.69 and 80,507.40 is: 120,774.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,613.54 : 408,964.69 = 80,507.40 : x
  2. Step 2: Convert to fraction form
    272,613.54/408,964.69 = 80,507.40/x
  3. Step 3: Cross multiply
    272,613.54x = 408,964.69 × 80,507.40
  4. Step 4: Simplify right side
    272,613.54x = 32,924,683,139.04
  5. Step 5: Solve for x
    x = 32,924,683,139.04/272,613.54
  6. Step 6: Final answer
    x = 120,774.20

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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.