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Finding the Fourth Proportional to 103,679.92, 155,563.60 and 51,089.84

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Solution

The fourth proportional to 103,679.92, 155,563.60 and 51,089.84 is: 76,656.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,679.92 : 155,563.60 = 51,089.84 : x
  2. Step 2: Convert to fraction form
    103,679.92/155,563.60 = 51,089.84/x
  3. Step 3: Cross multiply
    103,679.92x = 155,563.60 × 51,089.84
  4. Step 4: Simplify right side
    103,679.92x = 7,947,719,433.82
  5. Step 5: Solve for x
    x = 7,947,719,433.82/103,679.92
  6. Step 6: Final answer
    x = 76,656.30

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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.