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Finding the Fourth Proportional to 129,207.40, 193,811.10 and 111,711.40

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Solution

The fourth proportional to 129,207.40, 193,811.10 and 111,711.40 is: 167,567.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,207.40 : 193,811.10 = 111,711.40 : x
  2. Step 2: Convert to fraction form
    129,207.40/193,811.10 = 111,711.40/x
  3. Step 3: Cross multiply
    129,207.40x = 193,811.10 × 111,711.40
  4. Step 4: Simplify right side
    129,207.40x = 21,650,909,316.54
  5. Step 5: Solve for x
    x = 21,650,909,316.54/129,207.40
  6. Step 6: Final answer
    x = 167,567.10

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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.