Home / 139,705.36-192,788.05-79,272.40

Finding the Fourth Proportional to 139,705.36, 192,788.05 and 79,272.40

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Solution

The fourth proportional to 139,705.36, 192,788.05 and 79,272.40 is: 109,392.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,705.36 : 192,788.05 = 79,272.40 : x
  2. Step 2: Convert to fraction form
    139,705.36/192,788.05 = 79,272.40/x
  3. Step 3: Cross multiply
    139,705.36x = 192,788.05 × 79,272.40
  4. Step 4: Simplify right side
    139,705.36x = 15,282,770,734.67
  5. Step 5: Solve for x
    x = 15,282,770,734.67/139,705.36
  6. Step 6: Final answer
    x = 109,392.88

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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.