Home / 149,381.74-206,144.15-81,399.19

Finding the Fourth Proportional to 149,381.74, 206,144.15 and 81,399.19

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Solution

The fourth proportional to 149,381.74, 206,144.15 and 81,399.19 is: 112,329.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,381.74 : 206,144.15 = 81,399.19 : x
  2. Step 2: Convert to fraction form
    149,381.74/206,144.15 = 81,399.19/x
  3. Step 3: Cross multiply
    149,381.74x = 206,144.15 × 81,399.19
  4. Step 4: Simplify right side
    149,381.74x = 16,779,966,426.24
  5. Step 5: Solve for x
    x = 16,779,966,426.24/149,381.74
  6. Step 6: Final answer
    x = 112,329.43

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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.