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Finding the Fourth Proportional to 181,981.80, 272,843.10 and 69,618.60

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Solution

The fourth proportional to 181,981.80, 272,843.10 and 69,618.60 is: 104,378.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,981.80 : 272,843.10 = 69,618.60 : x
  2. Step 2: Convert to fraction form
    181,981.80/272,843.10 = 69,618.60/x
  3. Step 3: Cross multiply
    181,981.80x = 272,843.10 × 69,618.60
  4. Step 4: Simplify right side
    181,981.80x = 18,994,954,641.66
  5. Step 5: Solve for x
    x = 18,994,954,641.66/181,981.80
  6. Step 6: Final answer
    x = 104,378.32

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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.