Home / 138,186.09-206,946.97-78,841.85

Finding the Fourth Proportional to 138,186.09, 206,946.97 and 78,841.85

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Solution

The fourth proportional to 138,186.09, 206,946.97 and 78,841.85 is: 118,073.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,186.09 : 206,946.97 = 78,841.85 : x
  2. Step 2: Convert to fraction form
    138,186.09/206,946.97 = 78,841.85/x
  3. Step 3: Cross multiply
    138,186.09x = 206,946.97 × 78,841.85
  4. Step 4: Simplify right side
    138,186.09x = 16,316,080,537.75
  5. Step 5: Solve for x
    x = 16,316,080,537.75/138,186.09
  6. Step 6: Final answer
    x = 118,073.25

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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.