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Finding the Fourth Proportional to 68,886.45, 103,345.88 and 21,499.83

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Solution

The fourth proportional to 68,886.45, 103,345.88 and 21,499.83 is: 32,254.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,886.45 : 103,345.88 = 21,499.83 : x
  2. Step 2: Convert to fraction form
    68,886.45/103,345.88 = 21,499.83/x
  3. Step 3: Cross multiply
    68,886.45x = 103,345.88 × 21,499.83
  4. Step 4: Simplify right side
    68,886.45x = 2,221,918,743.70
  5. Step 5: Solve for x
    x = 2,221,918,743.70/68,886.45
  6. Step 6: Final answer
    x = 32,254.80

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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.