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Finding the Fourth Proportional to 129,073.12, 193,629.33 and 65,858.69

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Solution

The fourth proportional to 129,073.12, 193,629.33 and 65,858.69 is: 98,798.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,073.12 : 193,629.33 = 65,858.69 : x
  2. Step 2: Convert to fraction form
    129,073.12/193,629.33 = 65,858.69/x
  3. Step 3: Cross multiply
    129,073.12x = 193,629.33 × 65,858.69
  4. Step 4: Simplify right side
    129,073.12x = 12,752,174,503.45
  5. Step 5: Solve for x
    x = 12,752,174,503.45/129,073.12
  6. Step 6: Final answer
    x = 98,798.07

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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.