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Finding the Fourth Proportional to 272,405.70, 408,520.62 and 99,272.79

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Solution

The fourth proportional to 272,405.70, 408,520.62 and 99,272.79 is: 148,877.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,405.70 : 408,520.62 = 99,272.79 : x
  2. Step 2: Convert to fraction form
    272,405.70/408,520.62 = 99,272.79/x
  3. Step 3: Cross multiply
    272,405.70x = 408,520.62 × 99,272.79
  4. Step 4: Simplify right side
    272,405.70x = 40,554,981,719.93
  5. Step 5: Solve for x
    x = 40,554,981,719.93/272,405.70
  6. Step 6: Final answer
    x = 148,877.14

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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.