Home / 74,625.84-111,945.11-21,318.66

Finding the Fourth Proportional to 74,625.84, 111,945.11 and 21,318.66

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Solution

The fourth proportional to 74,625.84, 111,945.11 and 21,318.66 is: 31,979.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,625.84 : 111,945.11 = 21,318.66 : x
  2. Step 2: Convert to fraction form
    74,625.84/111,945.11 = 21,318.66/x
  3. Step 3: Cross multiply
    74,625.84x = 111,945.11 × 21,318.66
  4. Step 4: Simplify right side
    74,625.84x = 2,386,519,632.16
  5. Step 5: Solve for x
    x = 2,386,519,632.16/74,625.84
  6. Step 6: Final answer
    x = 31,979.80

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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.