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Finding the Fourth Proportional to 109,690.88, 151,365.12 and 61,937.60

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Solution

The fourth proportional to 109,690.88, 151,365.12 and 61,937.60 is: 85,469.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,690.88 : 151,365.12 = 61,937.60 : x
  2. Step 2: Convert to fraction form
    109,690.88/151,365.12 = 61,937.60/x
  3. Step 3: Cross multiply
    109,690.88x = 151,365.12 × 61,937.60
  4. Step 4: Simplify right side
    109,690.88x = 9,375,192,256.51
  5. Step 5: Solve for x
    x = 9,375,192,256.51/109,690.88
  6. Step 6: Final answer
    x = 85,469.20

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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.