Home / 87,805.64-121,171.78-47,519.40

Finding the Fourth Proportional to 87,805.64, 121,171.78 and 47,519.40

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Solution

The fourth proportional to 87,805.64, 121,171.78 and 47,519.40 is: 65,576.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,805.64 : 121,171.78 = 47,519.40 : x
  2. Step 2: Convert to fraction form
    87,805.64/121,171.78 = 47,519.40/x
  3. Step 3: Cross multiply
    87,805.64x = 121,171.78 × 47,519.40
  4. Step 4: Simplify right side
    87,805.64x = 5,758,010,282.53
  5. Step 5: Solve for x
    x = 5,758,010,282.53/87,805.64
  6. Step 6: Final answer
    x = 65,576.77

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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.