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Finding the Fourth Proportional to 161,699.78, 223,145.82 and 90,079.98

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Solution

The fourth proportional to 161,699.78, 223,145.82 and 90,079.98 is: 124,310.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,699.78 : 223,145.82 = 90,079.98 : x
  2. Step 2: Convert to fraction form
    161,699.78/223,145.82 = 90,079.98/x
  3. Step 3: Cross multiply
    161,699.78x = 223,145.82 × 90,079.98
  4. Step 4: Simplify right side
    161,699.78x = 20,100,971,002.68
  5. Step 5: Solve for x
    x = 20,100,971,002.68/161,699.78
  6. Step 6: Final answer
    x = 124,310.44

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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.