Home / 111,511.54-153,886.13-66,198.60

Finding the Fourth Proportional to 111,511.54, 153,886.13 and 66,198.60

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Solution

The fourth proportional to 111,511.54, 153,886.13 and 66,198.60 is: 91,354.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,511.54 : 153,886.13 = 66,198.60 : x
  2. Step 2: Convert to fraction form
    111,511.54/153,886.13 = 66,198.60/x
  3. Step 3: Cross multiply
    111,511.54x = 153,886.13 × 66,198.60
  4. Step 4: Simplify right side
    111,511.54x = 10,187,046,365.42
  5. Step 5: Solve for x
    x = 10,187,046,365.42/111,511.54
  6. Step 6: Final answer
    x = 91,354.19

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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.