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Finding the Fourth Proportional to 153,761.36, 212,190.88 and 85,782.72

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Solution

The fourth proportional to 153,761.36, 212,190.88 and 85,782.72 is: 118,380.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,761.36 : 212,190.88 = 85,782.72 : x
  2. Step 2: Convert to fraction form
    153,761.36/212,190.88 = 85,782.72/x
  3. Step 3: Cross multiply
    153,761.36x = 212,190.88 × 85,782.72
  4. Step 4: Simplify right side
    153,761.36x = 18,202,310,845.59
  5. Step 5: Solve for x
    x = 18,202,310,845.59/153,761.36
  6. Step 6: Final answer
    x = 118,380.27

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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.