Home / 149,381.45-206,143.72-81,399.01

Finding the Fourth Proportional to 149,381.45, 206,143.72 and 81,399.01

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Solution

The fourth proportional to 149,381.45, 206,143.72 and 81,399.01 is: 112,329.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,381.45 : 206,143.72 = 81,399.01 : x
  2. Step 2: Convert to fraction form
    149,381.45/206,143.72 = 81,399.01/x
  3. Step 3: Cross multiply
    149,381.45x = 206,143.72 × 81,399.01
  4. Step 4: Simplify right side
    149,381.45x = 16,779,894,725.72
  5. Step 5: Solve for x
    x = 16,779,894,725.72/149,381.45
  6. Step 6: Final answer
    x = 112,329.17

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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.