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Finding the Fourth Proportional to 79,787.76, 110,004.88 and 65,394.64

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Solution

The fourth proportional to 79,787.76, 110,004.88 and 65,394.64 is: 90,160.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,787.76 : 110,004.88 = 65,394.64 : x
  2. Step 2: Convert to fraction form
    79,787.76/110,004.88 = 65,394.64/x
  3. Step 3: Cross multiply
    79,787.76x = 110,004.88 × 65,394.64
  4. Step 4: Simplify right side
    79,787.76x = 7,193,729,525.84
  5. Step 5: Solve for x
    x = 7,193,729,525.84/79,787.76
  6. Step 6: Final answer
    x = 90,160.82

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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.