Home / 138,732.27-191,428.88-79,104.75

Finding the Fourth Proportional to 138,732.27, 191,428.88 and 79,104.75

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Solution

The fourth proportional to 138,732.27, 191,428.88 and 79,104.75 is: 109,152.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,732.27 : 191,428.88 = 79,104.75 : x
  2. Step 2: Convert to fraction form
    138,732.27/191,428.88 = 79,104.75/x
  3. Step 3: Cross multiply
    138,732.27x = 191,428.88 × 79,104.75
  4. Step 4: Simplify right side
    138,732.27x = 15,142,933,299.66
  5. Step 5: Solve for x
    x = 15,142,933,299.66/138,732.27
  6. Step 6: Final answer
    x = 109,152.21

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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.