Home / 138,680.17-191,378.48-75,017.81

Finding the Fourth Proportional to 138,680.17, 191,378.48 and 75,017.81

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Solution

The fourth proportional to 138,680.17, 191,378.48 and 75,017.81 is: 103,524.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,680.17 : 191,378.48 = 75,017.81 : x
  2. Step 2: Convert to fraction form
    138,680.17/191,378.48 = 75,017.81/x
  3. Step 3: Cross multiply
    138,680.17x = 191,378.48 × 75,017.81
  4. Step 4: Simplify right side
    138,680.17x = 14,356,794,450.73
  5. Step 5: Solve for x
    x = 14,356,794,450.73/138,680.17
  6. Step 6: Final answer
    x = 103,524.49

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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.