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Finding the Fourth Proportional to 108,781.41, 150,118.20 and 61,039.20

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Solution

The fourth proportional to 108,781.41, 150,118.20 and 61,039.20 is: 84,234.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,781.41 : 150,118.20 = 61,039.20 : x
  2. Step 2: Convert to fraction form
    108,781.41/150,118.20 = 61,039.20/x
  3. Step 3: Cross multiply
    108,781.41x = 150,118.20 × 61,039.20
  4. Step 4: Simplify right side
    108,781.41x = 9,163,094,833.44
  5. Step 5: Solve for x
    x = 9,163,094,833.44/108,781.41
  6. Step 6: Final answer
    x = 84,234.01

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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.