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Finding the Fourth Proportional to 68,658.72, 103,031.40 and 29,215.80

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Solution

The fourth proportional to 68,658.72, 103,031.40 and 29,215.80 is: 43,842.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,658.72 : 103,031.40 = 29,215.80 : x
  2. Step 2: Convert to fraction form
    68,658.72/103,031.40 = 29,215.80/x
  3. Step 3: Cross multiply
    68,658.72x = 103,031.40 × 29,215.80
  4. Step 4: Simplify right side
    68,658.72x = 3,010,144,776.12
  5. Step 5: Solve for x
    x = 3,010,144,776.12/68,658.72
  6. Step 6: Final answer
    x = 43,842.13

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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.