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Finding the Fourth Proportional to 181,620.80, 272,301.60 and 81,699.20

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Solution

The fourth proportional to 181,620.80, 272,301.60 and 81,699.20 is: 122,490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,620.80 : 272,301.60 = 81,699.20 : x
  2. Step 2: Convert to fraction form
    181,620.80/272,301.60 = 81,699.20/x
  3. Step 3: Cross multiply
    181,620.80x = 272,301.60 × 81,699.20
  4. Step 4: Simplify right side
    181,620.80x = 22,246,822,878.72
  5. Step 5: Solve for x
    x = 22,246,822,878.72/181,620.80
  6. Step 6: Final answer
    x = 122,490.50

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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.