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Finding the Fourth Proportional to 149,168.49, 205,816.59 and 87,917.12

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Solution

The fourth proportional to 149,168.49, 205,816.59 and 87,917.12 is: 121,304.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,168.49 : 205,816.59 = 87,917.12 : x
  2. Step 2: Convert to fraction form
    149,168.49/205,816.59 = 87,917.12/x
  3. Step 3: Cross multiply
    149,168.49x = 205,816.59 × 87,917.12
  4. Step 4: Simplify right side
    149,168.49x = 18,094,801,841.02
  5. Step 5: Solve for x
    x = 18,094,801,841.02/149,168.49
  6. Step 6: Final answer
    x = 121,304.45

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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.