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Finding the Fourth Proportional to 79,263.94, 109,288.59 and 68,489.34

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Solution

The fourth proportional to 79,263.94, 109,288.59 and 68,489.34 is: 94,432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,263.94 : 109,288.59 = 68,489.34 : x
  2. Step 2: Convert to fraction form
    79,263.94/109,288.59 = 68,489.34/x
  3. Step 3: Cross multiply
    79,263.94x = 109,288.59 × 68,489.34
  4. Step 4: Simplify right side
    79,263.94x = 7,485,103,398.63
  5. Step 5: Solve for x
    x = 7,485,103,398.63/79,263.94
  6. Step 6: Final answer
    x = 94,432.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.