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Finding the Fourth Proportional to 111,542.33, 153,988.43 and 85,992.71

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Solution

The fourth proportional to 111,542.33, 153,988.43 and 85,992.71 is: 118,716.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,542.33 : 153,988.43 = 85,992.71 : x
  2. Step 2: Convert to fraction form
    111,542.33/153,988.43 = 85,992.71/x
  3. Step 3: Cross multiply
    111,542.33x = 153,988.43 × 85,992.71
  4. Step 4: Simplify right side
    111,542.33x = 13,241,881,204.44
  5. Step 5: Solve for x
    x = 13,241,881,204.44/111,542.33
  6. Step 6: Final answer
    x = 118,716.19

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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.