Home / 72,776.28-100,431.68-40,945.72

Finding the Fourth Proportional to 72,776.28, 100,431.68 and 40,945.72

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Solution

The fourth proportional to 72,776.28, 100,431.68 and 40,945.72 is: 56,505.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,776.28 : 100,431.68 = 40,945.72 : x
  2. Step 2: Convert to fraction form
    72,776.28/100,431.68 = 40,945.72/x
  3. Step 3: Cross multiply
    72,776.28x = 100,431.68 × 40,945.72
  4. Step 4: Simplify right side
    72,776.28x = 4,112,247,448.41
  5. Step 5: Solve for x
    x = 4,112,247,448.41/72,776.28
  6. Step 6: Final answer
    x = 56,505.33

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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.