Home / 138,868.30-191,653.83-78,442.83

Finding the Fourth Proportional to 138,868.30, 191,653.83 and 78,442.83

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Solution

The fourth proportional to 138,868.30, 191,653.83 and 78,442.83 is: 108,259.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,868.30 : 191,653.83 = 78,442.83 : x
  2. Step 2: Convert to fraction form
    138,868.30/191,653.83 = 78,442.83/x
  3. Step 3: Cross multiply
    138,868.30x = 191,653.83 × 78,442.83
  4. Step 4: Simplify right side
    138,868.30x = 15,033,869,500.94
  5. Step 5: Solve for x
    x = 15,033,869,500.94/138,868.30
  6. Step 6: Final answer
    x = 108,259.91

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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.