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Finding the Fourth Proportional to 68,789.93, 103,200.98 and 21,402.68

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Solution

The fourth proportional to 68,789.93, 103,200.98 and 21,402.68 is: 32,109.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,789.93 : 103,200.98 = 21,402.68 : x
  2. Step 2: Convert to fraction form
    68,789.93/103,200.98 = 21,402.68/x
  3. Step 3: Cross multiply
    68,789.93x = 103,200.98 × 21,402.68
  4. Step 4: Simplify right side
    68,789.93x = 2,208,776,927.61
  5. Step 5: Solve for x
    x = 2,208,776,927.61/68,789.93
  6. Step 6: Final answer
    x = 32,109.02

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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.