Home / 81,035.12-121,489.73-52,511.82

Finding the Fourth Proportional to 81,035.12, 121,489.73 and 52,511.82

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Solution

The fourth proportional to 81,035.12, 121,489.73 and 52,511.82 is: 78,726.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,035.12 : 121,489.73 = 52,511.82 : x
  2. Step 2: Convert to fraction form
    81,035.12/121,489.73 = 52,511.82/x
  3. Step 3: Cross multiply
    81,035.12x = 121,489.73 × 52,511.82
  4. Step 4: Simplify right side
    81,035.12x = 6,379,646,306.59
  5. Step 5: Solve for x
    x = 6,379,646,306.59/81,035.12
  6. Step 6: Final answer
    x = 78,726.93

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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.