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Finding the Fourth Proportional to 209,313.78, 288,751.50 and 124,370.70

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Solution

The fourth proportional to 209,313.78, 288,751.50 and 124,370.70 is: 171,571.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,313.78 : 288,751.50 = 124,370.70 : x
  2. Step 2: Convert to fraction form
    209,313.78/288,751.50 = 124,370.70/x
  3. Step 3: Cross multiply
    209,313.78x = 288,751.50 × 124,370.70
  4. Step 4: Simplify right side
    209,313.78x = 35,912,226,181.05
  5. Step 5: Solve for x
    x = 35,912,226,181.05/209,313.78
  6. Step 6: Final answer
    x = 171,571.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.