Home / 87,177.97-120,206.50-78,677.36

Finding the Fourth Proportional to 87,177.97, 120,206.50 and 78,677.36

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Solution

The fourth proportional to 87,177.97, 120,206.50 and 78,677.36 is: 108,485.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,177.97 : 120,206.50 = 78,677.36 : x
  2. Step 2: Convert to fraction form
    87,177.97/120,206.50 = 78,677.36/x
  3. Step 3: Cross multiply
    87,177.97x = 120,206.50 × 78,677.36
  4. Step 4: Simplify right side
    87,177.97x = 9,457,529,727.89
  5. Step 5: Solve for x
    x = 9,457,529,727.89/87,177.97
  6. Step 6: Final answer
    x = 108,485.32

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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.