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Finding the Fourth Proportional to 111,628.10, 154,044.10 and 63,878.40

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Solution

The fourth proportional to 111,628.10, 154,044.10 and 63,878.40 is: 88,150.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,628.10 : 154,044.10 = 63,878.40 : x
  2. Step 2: Convert to fraction form
    111,628.10/154,044.10 = 63,878.40/x
  3. Step 3: Cross multiply
    111,628.10x = 154,044.10 × 63,878.40
  4. Step 4: Simplify right side
    111,628.10x = 9,840,090,637.44
  5. Step 5: Solve for x
    x = 9,840,090,637.44/111,628.10
  6. Step 6: Final answer
    x = 88,150.66

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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.