Home / 87,993.10-121,500.39-81,276.31

Finding the Fourth Proportional to 87,993.10, 121,500.39 and 81,276.31

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Solution

The fourth proportional to 87,993.10, 121,500.39 and 81,276.31 is: 112,225.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,993.10 : 121,500.39 = 81,276.31 : x
  2. Step 2: Convert to fraction form
    87,993.10/121,500.39 = 81,276.31/x
  3. Step 3: Cross multiply
    87,993.10x = 121,500.39 × 81,276.31
  4. Step 4: Simplify right side
    87,993.10x = 9,875,103,362.76
  5. Step 5: Solve for x
    x = 9,875,103,362.76/87,993.10
  6. Step 6: Final answer
    x = 112,225.88

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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.