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Finding the Fourth Proportional to 111,962.59, 154,508.81 and 66,640.35

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Solution

The fourth proportional to 111,962.59, 154,508.81 and 66,640.35 is: 91,963.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,962.59 : 154,508.81 = 66,640.35 : x
  2. Step 2: Convert to fraction form
    111,962.59/154,508.81 = 66,640.35/x
  3. Step 3: Cross multiply
    111,962.59x = 154,508.81 × 66,640.35
  4. Step 4: Simplify right side
    111,962.59x = 10,296,521,176.48
  5. Step 5: Solve for x
    x = 10,296,521,176.48/111,962.59
  6. Step 6: Final answer
    x = 91,963.94

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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.