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Finding the Fourth Proportional to 121,191.56, 181,505.16 and 116,987.66

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Solution

The fourth proportional to 121,191.56, 181,505.16 and 116,987.66 is: 175,209.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,191.56 : 181,505.16 = 116,987.66 : x
  2. Step 2: Convert to fraction form
    121,191.56/181,505.16 = 116,987.66/x
  3. Step 3: Cross multiply
    121,191.56x = 181,505.16 × 116,987.66
  4. Step 4: Simplify right side
    121,191.56x = 21,233,863,946.33
  5. Step 5: Solve for x
    x = 21,233,863,946.33/121,191.56
  6. Step 6: Final answer
    x = 175,209.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.