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Finding the Fourth Proportional to 79,489.04, 109,703.31 and 47,660.90

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Solution

The fourth proportional to 79,489.04, 109,703.31 and 47,660.90 is: 65,777.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,489.04 : 109,703.31 = 47,660.90 : x
  2. Step 2: Convert to fraction form
    79,489.04/109,703.31 = 47,660.90/x
  3. Step 3: Cross multiply
    79,489.04x = 109,703.31 × 47,660.90
  4. Step 4: Simplify right side
    79,489.04x = 5,228,558,487.58
  5. Step 5: Solve for x
    x = 5,228,558,487.58/79,489.04
  6. Step 6: Final answer
    x = 65,777.10

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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.