Home / 100,113.23-138,154.39-54,790.30

Finding the Fourth Proportional to 100,113.23, 138,154.39 and 54,790.30

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Solution

The fourth proportional to 100,113.23, 138,154.39 and 54,790.30 is: 75,609.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,113.23 : 138,154.39 = 54,790.30 : x
  2. Step 2: Convert to fraction form
    100,113.23/138,154.39 = 54,790.30/x
  3. Step 3: Cross multiply
    100,113.23x = 138,154.39 × 54,790.30
  4. Step 4: Simplify right side
    100,113.23x = 7,569,520,474.42
  5. Step 5: Solve for x
    x = 7,569,520,474.42/100,113.23
  6. Step 6: Final answer
    x = 75,609.59

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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.