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Finding the Fourth Proportional to 108,690.66, 149,991.20 and 60,943.86

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Solution

The fourth proportional to 108,690.66, 149,991.20 and 60,943.86 is: 84,101.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,690.66 : 149,991.20 = 60,943.86 : x
  2. Step 2: Convert to fraction form
    108,690.66/149,991.20 = 60,943.86/x
  3. Step 3: Cross multiply
    108,690.66x = 149,991.20 × 60,943.86
  4. Step 4: Simplify right side
    108,690.66x = 9,141,042,694.03
  5. Step 5: Solve for x
    x = 9,141,042,694.03/108,690.66
  6. Step 6: Final answer
    x = 84,101.46

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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.