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Finding the Fourth Proportional to 153,252.78, 211,489.90 and 85,272.62

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Solution

The fourth proportional to 153,252.78, 211,489.90 and 85,272.62 is: 117,676.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,252.78 : 211,489.90 = 85,272.62 : x
  2. Step 2: Convert to fraction form
    153,252.78/211,489.90 = 85,272.62/x
  3. Step 3: Cross multiply
    153,252.78x = 211,489.90 × 85,272.62
  4. Step 4: Simplify right side
    153,252.78x = 18,034,297,876.54
  5. Step 5: Solve for x
    x = 18,034,297,876.54/153,252.78
  6. Step 6: Final answer
    x = 117,676.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.