Home / 87,685.20-121,006.46-47,399.72

Finding the Fourth Proportional to 87,685.20, 121,006.46 and 47,399.72

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Solution

The fourth proportional to 87,685.20, 121,006.46 and 47,399.72 is: 65,412.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,685.20 : 121,006.46 = 47,399.72 : x
  2. Step 2: Convert to fraction form
    87,685.20/121,006.46 = 47,399.72/x
  3. Step 3: Cross multiply
    87,685.20x = 121,006.46 × 47,399.72
  4. Step 4: Simplify right side
    87,685.20x = 5,735,672,322.19
  5. Step 5: Solve for x
    x = 5,735,672,322.19/87,685.20
  6. Step 6: Final answer
    x = 65,412.09

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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.