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Finding the Fourth Proportional to 272,571.21, 408,828.06 and 72,911.75

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Solution

The fourth proportional to 272,571.21, 408,828.06 and 72,911.75 is: 109,359.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,571.21 : 408,828.06 = 72,911.75 : x
  2. Step 2: Convert to fraction form
    272,571.21/408,828.06 = 72,911.75/x
  3. Step 3: Cross multiply
    272,571.21x = 408,828.06 × 72,911.75
  4. Step 4: Simplify right side
    272,571.21x = 29,808,369,303.71
  5. Step 5: Solve for x
    x = 29,808,369,303.71/272,571.21
  6. Step 6: Final answer
    x = 109,359.93

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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.