Home / 100,113.43-138,154.67-54,790.49

Finding the Fourth Proportional to 100,113.43, 138,154.67 and 54,790.49

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Solution

The fourth proportional to 100,113.43, 138,154.67 and 54,790.49 is: 75,609.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,113.43 : 138,154.67 = 54,790.49 : x
  2. Step 2: Convert to fraction form
    100,113.43/138,154.67 = 54,790.49/x
  3. Step 3: Cross multiply
    100,113.43x = 138,154.67 × 54,790.49
  4. Step 4: Simplify right side
    100,113.43x = 7,569,561,791.14
  5. Step 5: Solve for x
    x = 7,569,561,791.14/100,113.43
  6. Step 6: Final answer
    x = 75,609.85

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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.