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Finding the Fourth Proportional to 121,270.70, 181,906.05 and 91,746.20

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Solution

The fourth proportional to 121,270.70, 181,906.05 and 91,746.20 is: 137,619.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,270.70 : 181,906.05 = 91,746.20 : x
  2. Step 2: Convert to fraction form
    121,270.70/181,906.05 = 91,746.20/x
  3. Step 3: Cross multiply
    121,270.70x = 181,906.05 × 91,746.20
  4. Step 4: Simplify right side
    121,270.70x = 16,689,188,844.51
  5. Step 5: Solve for x
    x = 16,689,188,844.51/121,270.70
  6. Step 6: Final answer
    x = 137,619.30

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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.