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Finding the Fourth Proportional to 217,907.10, 326,860.65 and 99,809.10

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Solution

The fourth proportional to 217,907.10, 326,860.65 and 99,809.10 is: 149,713.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,907.10 : 326,860.65 = 99,809.10 : x
  2. Step 2: Convert to fraction form
    217,907.10/326,860.65 = 99,809.10/x
  3. Step 3: Cross multiply
    217,907.10x = 326,860.65 × 99,809.10
  4. Step 4: Simplify right side
    217,907.10x = 32,623,667,301.92
  5. Step 5: Solve for x
    x = 32,623,667,301.92/217,907.10
  6. Step 6: Final answer
    x = 149,713.65

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Similar ratio
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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.