Home / 231,062.15-318,834.21-129,075

Finding the Fourth Proportional to 231,062.15, 318,834.21 and 129,075

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Solution

The fourth proportional to 231,062.15, 318,834.21 and 129,075 is: 178,105.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,062.15 : 318,834.21 = 129,075 : x
  2. Step 2: Convert to fraction form
    231,062.15/318,834.21 = 129,075/x
  3. Step 3: Cross multiply
    231,062.15x = 318,834.21 × 129,075
  4. Step 4: Simplify right side
    231,062.15x = 41,153,525,655.75
  5. Step 5: Solve for x
    x = 41,153,525,655.75/231,062.15
  6. Step 6: Final answer
    x = 178,105.87

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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.