Home / 138,033.05-207,171.08-81,802.85

Finding the Fourth Proportional to 138,033.05, 207,171.08 and 81,802.85

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Solution

The fourth proportional to 138,033.05, 207,171.08 and 81,802.85 is: 122,776.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,033.05 : 207,171.08 = 81,802.85 : x
  2. Step 2: Convert to fraction form
    138,033.05/207,171.08 = 81,802.85/x
  3. Step 3: Cross multiply
    138,033.05x = 207,171.08 × 81,802.85
  4. Step 4: Simplify right side
    138,033.05x = 16,947,184,372.56
  5. Step 5: Solve for x
    x = 16,947,184,372.56/138,033.05
  6. Step 6: Final answer
    x = 122,776.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.