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Finding the Fourth Proportional to 129,191.16, 193,616.64 and 69,212.69

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Solution

The fourth proportional to 129,191.16, 193,616.64 and 69,212.69 is: 103,727.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,191.16 : 193,616.64 = 69,212.69 : x
  2. Step 2: Convert to fraction form
    129,191.16/193,616.64 = 69,212.69/x
  3. Step 3: Cross multiply
    129,191.16x = 193,616.64 × 69,212.69
  4. Step 4: Simplify right side
    129,191.16x = 13,400,727,515.08
  5. Step 5: Solve for x
    x = 13,400,727,515.08/129,191.16
  6. Step 6: Final answer
    x = 103,727.90

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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.