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Finding the Fourth Proportional to 111,681.39, 154,116.09 and 63,939.18

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Solution

The fourth proportional to 111,681.39, 154,116.09 and 63,939.18 is: 88,233.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,681.39 : 154,116.09 = 63,939.18 : x
  2. Step 2: Convert to fraction form
    111,681.39/154,116.09 = 63,939.18/x
  3. Step 3: Cross multiply
    111,681.39x = 154,116.09 × 63,939.18
  4. Step 4: Simplify right side
    111,681.39x = 9,854,056,419.41
  5. Step 5: Solve for x
    x = 9,854,056,419.41/111,681.39
  6. Step 6: Final answer
    x = 88,233.65

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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.