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Finding the Fourth Proportional to 79,721.40, 119,351.70 and 48,617.40

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Solution

The fourth proportional to 79,721.40, 119,351.70 and 48,617.40 is: 72,785.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,721.40 : 119,351.70 = 48,617.40 : x
  2. Step 2: Convert to fraction form
    79,721.40/119,351.70 = 48,617.40/x
  3. Step 3: Cross multiply
    79,721.40x = 119,351.70 × 48,617.40
  4. Step 4: Simplify right side
    79,721.40x = 5,802,569,339.58
  5. Step 5: Solve for x
    x = 5,802,569,339.58/79,721.40
  6. Step 6: Final answer
    x = 72,785.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.