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Finding the Fourth Proportional to 217,707.49, 300,437.07 and 120,911.58

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Solution

The fourth proportional to 217,707.49, 300,437.07 and 120,911.58 is: 166,858.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,707.49 : 300,437.07 = 120,911.58 : x
  2. Step 2: Convert to fraction form
    217,707.49/300,437.07 = 120,911.58/x
  3. Step 3: Cross multiply
    217,707.49x = 300,437.07 × 120,911.58
  4. Step 4: Simplify right side
    217,707.49x = 36,326,320,370.85
  5. Step 5: Solve for x
    x = 36,326,320,370.85/217,707.49
  6. Step 6: Final answer
    x = 166,858.38

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1.5x scale

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.