Home / 138,721.70-191,436.28-75,059.48

Finding the Fourth Proportional to 138,721.70, 191,436.28 and 75,059.48

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Solution

The fourth proportional to 138,721.70, 191,436.28 and 75,059.48 is: 103,582.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,721.70 : 191,436.28 = 75,059.48 : x
  2. Step 2: Convert to fraction form
    138,721.70/191,436.28 = 75,059.48/x
  3. Step 3: Cross multiply
    138,721.70x = 191,436.28 × 75,059.48
  4. Step 4: Simplify right side
    138,721.70x = 14,369,107,920.88
  5. Step 5: Solve for x
    x = 14,369,107,920.88/138,721.70
  6. Step 6: Final answer
    x = 103,582.26

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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.