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Finding the Fourth Proportional to 129,319.37, 193,978.83 and 40,579.57

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Solution

The fourth proportional to 129,319.37, 193,978.83 and 40,579.57 is: 60,869.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,319.37 : 193,978.83 = 40,579.57 : x
  2. Step 2: Convert to fraction form
    129,319.37/193,978.83 = 40,579.57/x
  3. Step 3: Cross multiply
    129,319.37x = 193,978.83 × 40,579.57
  4. Step 4: Simplify right side
    129,319.37x = 7,871,577,510.50
  5. Step 5: Solve for x
    x = 7,871,577,510.50/129,319.37
  6. Step 6: Final answer
    x = 60,869.28

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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.