Home / 81,231.10-121,803.45-34,431.10

Finding the Fourth Proportional to 81,231.10, 121,803.45 and 34,431.10

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Solution

The fourth proportional to 81,231.10, 121,803.45 and 34,431.10 is: 51,628.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,231.10 : 121,803.45 = 34,431.10 : x
  2. Step 2: Convert to fraction form
    81,231.10/121,803.45 = 34,431.10/x
  3. Step 3: Cross multiply
    81,231.10x = 121,803.45 × 34,431.10
  4. Step 4: Simplify right side
    81,231.10x = 4,193,826,767.30
  5. Step 5: Solve for x
    x = 4,193,826,767.30/81,231.10
  6. Step 6: Final answer
    x = 51,628.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.