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Finding the Fourth Proportional to 185,781.68, 256,380.60 and 100,900.40

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Solution

The fourth proportional to 185,781.68, 256,380.60 and 100,900.40 is: 139,243.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,781.68 : 256,380.60 = 100,900.40 : x
  2. Step 2: Convert to fraction form
    185,781.68/256,380.60 = 100,900.40/x
  3. Step 3: Cross multiply
    185,781.68x = 256,380.60 × 100,900.40
  4. Step 4: Simplify right side
    185,781.68x = 25,868,905,092.24
  5. Step 5: Solve for x
    x = 25,868,905,092.24/185,781.68
  6. Step 6: Final answer
    x = 139,243.57

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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.