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Finding the Fourth Proportional to 71,479.49, 107,049.74 and 56,640.69

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Solution

The fourth proportional to 71,479.49, 107,049.74 and 56,640.69 is: 84,826.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,479.49 : 107,049.74 = 56,640.69 : x
  2. Step 2: Convert to fraction form
    71,479.49/107,049.74 = 56,640.69/x
  3. Step 3: Cross multiply
    71,479.49x = 107,049.74 × 56,640.69
  4. Step 4: Simplify right side
    71,479.49x = 6,063,370,854.72
  5. Step 5: Solve for x
    x = 6,063,370,854.72/71,479.49
  6. Step 6: Final answer
    x = 84,826.73

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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.