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Finding the Fourth Proportional to 111,513.54, 153,888.89 and 66,200.60

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Solution

The fourth proportional to 111,513.54, 153,888.89 and 66,200.60 is: 91,356.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,513.54 : 153,888.89 = 66,200.60 : x
  2. Step 2: Convert to fraction form
    111,513.54/153,888.89 = 66,200.60/x
  3. Step 3: Cross multiply
    111,513.54x = 153,888.89 × 66,200.60
  4. Step 4: Simplify right side
    111,513.54x = 10,187,536,851.33
  5. Step 5: Solve for x
    x = 10,187,536,851.33/111,513.54
  6. Step 6: Final answer
    x = 91,356.95

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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.