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Finding the Fourth Proportional to 68,707.49, 103,044.64 and 28,704.86

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Solution

The fourth proportional to 68,707.49, 103,044.64 and 28,704.86 is: 43,050.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,707.49 : 103,044.64 = 28,704.86 : x
  2. Step 2: Convert to fraction form
    68,707.49/103,044.64 = 28,704.86/x
  3. Step 3: Cross multiply
    68,707.49x = 103,044.64 × 28,704.86
  4. Step 4: Simplify right side
    68,707.49x = 2,957,881,964.95
  5. Step 5: Solve for x
    x = 2,957,881,964.95/68,707.49
  6. Step 6: Final answer
    x = 43,050.36

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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.