Home / 100,353.17-138,486.23-57,910.79

Finding the Fourth Proportional to 100,353.17, 138,486.23 and 57,910.79

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Solution

The fourth proportional to 100,353.17, 138,486.23 and 57,910.79 is: 79,916.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,353.17 : 138,486.23 = 57,910.79 : x
  2. Step 2: Convert to fraction form
    100,353.17/138,486.23 = 57,910.79/x
  3. Step 3: Cross multiply
    100,353.17x = 138,486.23 × 57,910.79
  4. Step 4: Simplify right side
    100,353.17x = 8,019,846,983.42
  5. Step 5: Solve for x
    x = 8,019,846,983.42/100,353.17
  6. Step 6: Final answer
    x = 79,916.23

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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.