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Finding the Fourth Proportional to 122,133.80, 183,200.70 and 86,704.40

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Solution

The fourth proportional to 122,133.80, 183,200.70 and 86,704.40 is: 130,056.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,133.80 : 183,200.70 = 86,704.40 : x
  2. Step 2: Convert to fraction form
    122,133.80/183,200.70 = 86,704.40/x
  3. Step 3: Cross multiply
    122,133.80x = 183,200.70 × 86,704.40
  4. Step 4: Simplify right side
    122,133.80x = 15,884,306,773.08
  5. Step 5: Solve for x
    x = 15,884,306,773.08/122,133.80
  6. Step 6: Final answer
    x = 130,056.60

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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.