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Finding the Fourth Proportional to 209,993.92, 315,198.24 and 91,746.88

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Solution

The fourth proportional to 209,993.92, 315,198.24 and 91,746.88 is: 137,710.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,993.92 : 315,198.24 = 91,746.88 : x
  2. Step 2: Convert to fraction form
    209,993.92/315,198.24 = 91,746.88/x
  3. Step 3: Cross multiply
    209,993.92x = 315,198.24 × 91,746.88
  4. Step 4: Simplify right side
    209,993.92x = 28,918,455,101.49
  5. Step 5: Solve for x
    x = 28,918,455,101.49/209,993.92
  6. Step 6: Final answer
    x = 137,710.92

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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.