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Finding the Fourth Proportional to 154,173.97, 212,761.66 and 86,194.72

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Solution

The fourth proportional to 154,173.97, 212,761.66 and 86,194.72 is: 118,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,173.97 : 212,761.66 = 86,194.72 : x
  2. Step 2: Convert to fraction form
    154,173.97/212,761.66 = 86,194.72/x
  3. Step 3: Cross multiply
    154,173.97x = 212,761.66 × 86,194.72
  4. Step 4: Simplify right side
    154,173.97x = 18,338,931,710.44
  5. Step 5: Solve for x
    x = 18,338,931,710.44/154,173.97
  6. Step 6: Final answer
    x = 118,949.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.