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Finding the Fourth Proportional to 217,177.65, 325,614.60 and 128,385.45

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Solution

The fourth proportional to 217,177.65, 325,614.60 and 128,385.45 is: 192,488.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,177.65 : 325,614.60 = 128,385.45 : x
  2. Step 2: Convert to fraction form
    217,177.65/325,614.60 = 128,385.45/x
  3. Step 3: Cross multiply
    217,177.65x = 325,614.60 × 128,385.45
  4. Step 4: Simplify right side
    217,177.65x = 41,804,176,947.57
  5. Step 5: Solve for x
    x = 41,804,176,947.57/217,177.65
  6. Step 6: Final answer
    x = 192,488.39

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1.5x scale

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.