Home / 87,983.48-121,385.39-57,785.16

Finding the Fourth Proportional to 87,983.48, 121,385.39 and 57,785.16

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Solution

The fourth proportional to 87,983.48, 121,385.39 and 57,785.16 is: 79,722.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,983.48 : 121,385.39 = 57,785.16 : x
  2. Step 2: Convert to fraction form
    87,983.48/121,385.39 = 57,785.16/x
  3. Step 3: Cross multiply
    87,983.48x = 121,385.39 × 57,785.16
  4. Step 4: Simplify right side
    87,983.48x = 7,014,274,349.08
  5. Step 5: Solve for x
    x = 7,014,274,349.08/87,983.48
  6. Step 6: Final answer
    x = 79,722.63

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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.