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Finding the Fourth Proportional to 79,120.32, 109,136.88 and 48,914.88

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Solution

The fourth proportional to 79,120.32, 109,136.88 and 48,914.88 is: 67,472.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,120.32 : 109,136.88 = 48,914.88 : x
  2. Step 2: Convert to fraction form
    79,120.32/109,136.88 = 48,914.88/x
  3. Step 3: Cross multiply
    79,120.32x = 109,136.88 × 48,914.88
  4. Step 4: Simplify right side
    79,120.32x = 5,338,417,388.77
  5. Step 5: Solve for x
    x = 5,338,417,388.77/79,120.32
  6. Step 6: Final answer
    x = 67,472.14

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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.