Home / 149,418.69-206,192.51-81,434.31

Finding the Fourth Proportional to 149,418.69, 206,192.51 and 81,434.31

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Solution

The fourth proportional to 149,418.69, 206,192.51 and 81,434.31 is: 112,376.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,418.69 : 206,192.51 = 81,434.31 : x
  2. Step 2: Convert to fraction form
    149,418.69/206,192.51 = 81,434.31/x
  3. Step 3: Cross multiply
    149,418.69x = 206,192.51 × 81,434.31
  4. Step 4: Simplify right side
    149,418.69x = 16,791,144,371.85
  5. Step 5: Solve for x
    x = 16,791,144,371.85/149,418.69
  6. Step 6: Final answer
    x = 112,376.47

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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.