Home / 72,026.35-99,401.39-40,195.78

Finding the Fourth Proportional to 72,026.35, 99,401.39 and 40,195.78

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Solution

The fourth proportional to 72,026.35, 99,401.39 and 40,195.78 is: 55,472.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,026.35 : 99,401.39 = 40,195.78 : x
  2. Step 2: Convert to fraction form
    72,026.35/99,401.39 = 40,195.78/x
  3. Step 3: Cross multiply
    72,026.35x = 99,401.39 × 40,195.78
  4. Step 4: Simplify right side
    72,026.35x = 3,995,516,404.13
  5. Step 5: Solve for x
    x = 3,995,516,404.13/72,026.35
  6. Step 6: Final answer
    x = 55,472.98

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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.