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Finding the Fourth Proportional to 68,486.62, 102,746.52 and 21,739.90

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Solution

The fourth proportional to 68,486.62, 102,746.52 and 21,739.90 is: 32,615.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,486.62 : 102,746.52 = 21,739.90 : x
  2. Step 2: Convert to fraction form
    68,486.62/102,746.52 = 21,739.90/x
  3. Step 3: Cross multiply
    68,486.62x = 102,746.52 × 21,739.90
  4. Step 4: Simplify right side
    68,486.62x = 2,233,699,070.15
  5. Step 5: Solve for x
    x = 2,233,699,070.15/68,486.62
  6. Step 6: Final answer
    x = 32,615.12

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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.