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Finding the Fourth Proportional to 109,999.59, 151,773.15 and 66,978.57

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Solution

The fourth proportional to 109,999.59, 151,773.15 and 66,978.57 is: 92,414.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,999.59 : 151,773.15 = 66,978.57 : x
  2. Step 2: Convert to fraction form
    109,999.59/151,773.15 = 66,978.57/x
  3. Step 3: Cross multiply
    109,999.59x = 151,773.15 × 66,978.57
  4. Step 4: Simplify right side
    109,999.59x = 10,165,548,551.40
  5. Step 5: Solve for x
    x = 10,165,548,551.40/109,999.59
  6. Step 6: Final answer
    x = 92,414.42

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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.