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Finding the Fourth Proportional to 139,014.68, 191,835.11 and 75,351.11

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Solution

The fourth proportional to 139,014.68, 191,835.11 and 75,351.11 is: 103,981.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,014.68 : 191,835.11 = 75,351.11 : x
  2. Step 2: Convert to fraction form
    139,014.68/191,835.11 = 75,351.11/x
  3. Step 3: Cross multiply
    139,014.68x = 191,835.11 × 75,351.11
  4. Step 4: Simplify right side
    139,014.68x = 14,454,987,139.54
  5. Step 5: Solve for x
    x = 14,454,987,139.54/139,014.68
  6. Step 6: Final answer
    x = 103,981.74

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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.