Home / 139,014.20-191,839.92-75,351.72

Finding the Fourth Proportional to 139,014.20, 191,839.92 and 75,351.72

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Solution

The fourth proportional to 139,014.20, 191,839.92 and 75,351.72 is: 103,985.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,014.20 : 191,839.92 = 75,351.72 : x
  2. Step 2: Convert to fraction form
    139,014.20/191,839.92 = 75,351.72/x
  3. Step 3: Cross multiply
    139,014.20x = 191,839.92 × 75,351.72
  4. Step 4: Simplify right side
    139,014.20x = 14,455,467,936.66
  5. Step 5: Solve for x
    x = 14,455,467,936.66/139,014.20
  6. Step 6: Final answer
    x = 103,985.55

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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.