Home / 149,382.78-206,148.27-81,399.77

Finding the Fourth Proportional to 149,382.78, 206,148.27 and 81,399.77

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Solution

The fourth proportional to 149,382.78, 206,148.27 and 81,399.77 is: 112,331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,382.78 : 206,148.27 = 81,399.77 : x
  2. Step 2: Convert to fraction form
    149,382.78/206,148.27 = 81,399.77/x
  3. Step 3: Cross multiply
    149,382.78x = 206,148.27 × 81,399.77
  4. Step 4: Simplify right side
    149,382.78x = 16,780,421,763.90
  5. Step 5: Solve for x
    x = 16,780,421,763.90/149,382.78
  6. Step 6: Final answer
    x = 112,331.70

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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.