Home / 72,028.36-99,404.16-40,197.78

Finding the Fourth Proportional to 72,028.36, 99,404.16 and 40,197.78

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Solution

The fourth proportional to 72,028.36, 99,404.16 and 40,197.78 is: 55,475.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,028.36 : 99,404.16 = 40,197.78 : x
  2. Step 2: Convert to fraction form
    72,028.36/99,404.16 = 40,197.78/x
  3. Step 3: Cross multiply
    72,028.36x = 99,404.16 × 40,197.78
  4. Step 4: Simplify right side
    72,028.36x = 3,995,826,554.76
  5. Step 5: Solve for x
    x = 3,995,826,554.76/72,028.36
  6. Step 6: Final answer
    x = 55,475.74

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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.