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Finding the Fourth Proportional to 79,658.09, 109,915.29 and 45,660.32

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Solution

The fourth proportional to 79,658.09, 109,915.29 and 45,660.32 is: 63,003.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,658.09 : 109,915.29 = 45,660.32 : x
  2. Step 2: Convert to fraction form
    79,658.09/109,915.29 = 45,660.32/x
  3. Step 3: Cross multiply
    79,658.09x = 109,915.29 × 45,660.32
  4. Step 4: Simplify right side
    79,658.09x = 5,018,766,764.72
  5. Step 5: Solve for x
    x = 5,018,766,764.72/79,658.09
  6. Step 6: Final answer
    x = 63,003.86

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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.