Home / 138,390.30-190,996.89-77,972.85

Finding the Fourth Proportional to 138,390.30, 190,996.89 and 77,972.85

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Solution

The fourth proportional to 138,390.30, 190,996.89 and 77,972.85 is: 107,612.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,390.30 : 190,996.89 = 77,972.85 : x
  2. Step 2: Convert to fraction form
    138,390.30/190,996.89 = 77,972.85/x
  3. Step 3: Cross multiply
    138,390.30x = 190,996.89 × 77,972.85
  4. Step 4: Simplify right side
    138,390.30x = 14,892,571,854.44
  5. Step 5: Solve for x
    x = 14,892,571,854.44/138,390.30
  6. Step 6: Final answer
    x = 107,612.83

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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.