Home / 100,423.11-138,588.92-57,404.82

Finding the Fourth Proportional to 100,423.11, 138,588.92 and 57,404.82

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Solution

The fourth proportional to 100,423.11, 138,588.92 and 57,404.82 is: 79,221.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,423.11 : 138,588.92 = 57,404.82 : x
  2. Step 2: Convert to fraction form
    100,423.11/138,588.92 = 57,404.82/x
  3. Step 3: Cross multiply
    100,423.11x = 138,588.92 × 57,404.82
  4. Step 4: Simplify right side
    100,423.11x = 7,955,672,006.59
  5. Step 5: Solve for x
    x = 7,955,672,006.59/100,423.11
  6. Step 6: Final answer
    x = 79,221.53

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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.