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Finding the Fourth Proportional to 272,138.99, 408,068.55 and 122,250.71

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Solution

The fourth proportional to 272,138.99, 408,068.55 and 122,250.71 is: 183,313.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,138.99 : 408,068.55 = 122,250.71 : x
  2. Step 2: Convert to fraction form
    272,138.99/408,068.55 = 122,250.71/x
  3. Step 3: Cross multiply
    272,138.99x = 408,068.55 × 122,250.71
  4. Step 4: Simplify right side
    272,138.99x = 49,886,670,986.34
  5. Step 5: Solve for x
    x = 49,886,670,986.34/272,138.99
  6. Step 6: Final answer
    x = 183,313.21

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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.