Home / 123,330-170,195.40-66,741.78

Finding the Fourth Proportional to 123,330, 170,195.40 and 66,741.78

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Solution

The fourth proportional to 123,330, 170,195.40 and 66,741.78 is: 92,103.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,330 : 170,195.40 = 66,741.78 : x
  2. Step 2: Convert to fraction form
    123,330/170,195.40 = 66,741.78/x
  3. Step 3: Cross multiply
    123,330x = 170,195.40 × 66,741.78
  4. Step 4: Simplify right side
    123,330x = 11,359,143,943.81
  5. Step 5: Solve for x
    x = 11,359,143,943.81/123,330
  6. Step 6: Final answer
    x = 92,103.66

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1.5x scale

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.