Home / 87,629.28-120,928.32-47,885.28

Finding the Fourth Proportional to 87,629.28, 120,928.32 and 47,885.28

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Solution

The fourth proportional to 87,629.28, 120,928.32 and 47,885.28 is: 66,081.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,629.28 : 120,928.32 = 47,885.28 : x
  2. Step 2: Convert to fraction form
    87,629.28/120,928.32 = 47,885.28/x
  3. Step 3: Cross multiply
    87,629.28x = 120,928.32 × 47,885.28
  4. Step 4: Simplify right side
    87,629.28x = 5,790,686,463.13
  5. Step 5: Solve for x
    x = 5,790,686,463.13/87,629.28
  6. Step 6: Final answer
    x = 66,081.64

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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.