Home / 72,255.78-99,716.85-40,422.78

Finding the Fourth Proportional to 72,255.78, 99,716.85 and 40,422.78

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Solution

The fourth proportional to 72,255.78, 99,716.85 and 40,422.78 is: 55,785.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,255.78 : 99,716.85 = 40,422.78 : x
  2. Step 2: Convert to fraction form
    72,255.78/99,716.85 = 40,422.78/x
  3. Step 3: Cross multiply
    72,255.78x = 99,716.85 × 40,422.78
  4. Step 4: Simplify right side
    72,255.78x = 4,030,832,289.84
  5. Step 5: Solve for x
    x = 4,030,832,289.84/72,255.78
  6. Step 6: Final answer
    x = 55,785.60

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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.