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Finding the Fourth Proportional to 121,185.60, 181,600.20 and 87,975.60

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Solution

The fourth proportional to 121,185.60, 181,600.20 and 87,975.60 is: 131,834.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,185.60 : 181,600.20 = 87,975.60 : x
  2. Step 2: Convert to fraction form
    121,185.60/181,600.20 = 87,975.60/x
  3. Step 3: Cross multiply
    121,185.60x = 181,600.20 × 87,975.60
  4. Step 4: Simplify right side
    121,185.60x = 15,976,386,555.12
  5. Step 5: Solve for x
    x = 15,976,386,555.12/121,185.60
  6. Step 6: Final answer
    x = 131,834.03

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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.