Home / 68,712.72-103,064.19-21,326.66

Finding the Fourth Proportional to 68,712.72, 103,064.19 and 21,326.66

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Solution

The fourth proportional to 68,712.72, 103,064.19 and 21,326.66 is: 31,988.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,712.72 : 103,064.19 = 21,326.66 : x
  2. Step 2: Convert to fraction form
    68,712.72/103,064.19 = 21,326.66/x
  3. Step 3: Cross multiply
    68,712.72x = 103,064.19 × 21,326.66
  4. Step 4: Simplify right side
    68,712.72x = 2,198,014,729.50
  5. Step 5: Solve for x
    x = 2,198,014,729.50/68,712.72
  6. Step 6: Final answer
    x = 31,988.47

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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.