Home / 149,756.50-206,672.38-81,779.79

Finding the Fourth Proportional to 149,756.50, 206,672.38 and 81,779.79

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Solution

The fourth proportional to 149,756.50, 206,672.38 and 81,779.79 is: 112,860.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,756.50 : 206,672.38 = 81,779.79 : x
  2. Step 2: Convert to fraction form
    149,756.50/206,672.38 = 81,779.79/x
  3. Step 3: Cross multiply
    149,756.50x = 206,672.38 × 81,779.79
  4. Step 4: Simplify right side
    149,756.50x = 16,901,623,835.20
  5. Step 5: Solve for x
    x = 16,901,623,835.20/149,756.50
  6. Step 6: Final answer
    x = 112,860.71

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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.