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Finding the Fourth Proportional to 272,089.18, 408,133.11 and 72,409.54

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Solution

The fourth proportional to 272,089.18, 408,133.11 and 72,409.54 is: 108,614.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,089.18 : 408,133.11 = 72,409.54 : x
  2. Step 2: Convert to fraction form
    272,089.18/408,133.11 = 72,409.54/x
  3. Step 3: Cross multiply
    272,089.18x = 408,133.11 × 72,409.54
  4. Step 4: Simplify right side
    272,089.18x = 29,552,730,753.87
  5. Step 5: Solve for x
    x = 29,552,730,753.87/272,089.18
  6. Step 6: Final answer
    x = 108,614.13

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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.