Home / 149,398.87-206,168.56-81,418.81

Finding the Fourth Proportional to 149,398.87, 206,168.56 and 81,418.81

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Solution

The fourth proportional to 149,398.87, 206,168.56 and 81,418.81 is: 112,356.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,398.87 : 206,168.56 = 81,418.81 : x
  2. Step 2: Convert to fraction form
    149,398.87/206,168.56 = 81,418.81/x
  3. Step 3: Cross multiply
    149,398.87x = 206,168.56 × 81,418.81
  4. Step 4: Simplify right side
    149,398.87x = 16,785,998,814.61
  5. Step 5: Solve for x
    x = 16,785,998,814.61/149,398.87
  6. Step 6: Final answer
    x = 112,356.93

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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.