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Finding the Fourth Proportional to 108,724.80, 150,046.65 and 60,980.79

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Solution

The fourth proportional to 108,724.80, 150,046.65 and 60,980.79 is: 84,157.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,724.80 : 150,046.65 = 60,980.79 : x
  2. Step 2: Convert to fraction form
    108,724.80/150,046.65 = 60,980.79/x
  3. Step 3: Cross multiply
    108,724.80x = 150,046.65 × 60,980.79
  4. Step 4: Simplify right side
    108,724.80x = 9,149,963,253.85
  5. Step 5: Solve for x
    x = 9,149,963,253.85/108,724.80
  6. Step 6: Final answer
    x = 84,157.09

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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.