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Finding the Fourth Proportional to 185,805.60, 256,408.96 and 100,921.92

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Solution

The fourth proportional to 185,805.60, 256,408.96 and 100,921.92 is: 139,270.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,805.60 : 256,408.96 = 100,921.92 : x
  2. Step 2: Convert to fraction form
    185,805.60/256,408.96 = 100,921.92/x
  3. Step 3: Cross multiply
    185,805.60x = 256,408.96 × 100,921.92
  4. Step 4: Simplify right side
    185,805.60x = 25,877,284,548.40
  5. Step 5: Solve for x
    x = 25,877,284,548.40/185,805.60
  6. Step 6: Final answer
    x = 139,270.75

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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.