Home / 81,229.55-121,826.10-53,345.30

Finding the Fourth Proportional to 81,229.55, 121,826.10 and 53,345.30

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Solution

The fourth proportional to 81,229.55, 121,826.10 and 53,345.30 is: 80,005.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,229.55 : 121,826.10 = 53,345.30 : x
  2. Step 2: Convert to fraction form
    81,229.55/121,826.10 = 53,345.30/x
  3. Step 3: Cross multiply
    81,229.55x = 121,826.10 × 53,345.30
  4. Step 4: Simplify right side
    81,229.55x = 6,498,849,852.33
  5. Step 5: Solve for x
    x = 6,498,849,852.33/81,229.55
  6. Step 6: Final answer
    x = 80,005.98

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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.