Home / 78,611.17-108,498.78-49,964.20

Finding the Fourth Proportional to 78,611.17, 108,498.78 and 49,964.20

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Solution

The fourth proportional to 78,611.17, 108,498.78 and 49,964.20 is: 68,960.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,611.17 : 108,498.78 = 49,964.20 : x
  2. Step 2: Convert to fraction form
    78,611.17/108,498.78 = 49,964.20/x
  3. Step 3: Cross multiply
    78,611.17x = 108,498.78 × 49,964.20
  4. Step 4: Simplify right side
    78,611.17x = 5,421,054,743.68
  5. Step 5: Solve for x
    x = 5,421,054,743.68/78,611.17
  6. Step 6: Final answer
    x = 68,960.36

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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.