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Finding the Fourth Proportional to 139,680.95, 192,759.74 and 76,019.19

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Solution

The fourth proportional to 139,680.95, 192,759.74 and 76,019.19 is: 104,906.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,680.95 : 192,759.74 = 76,019.19 : x
  2. Step 2: Convert to fraction form
    139,680.95/192,759.74 = 76,019.19/x
  3. Step 3: Cross multiply
    139,680.95x = 192,759.74 × 76,019.19
  4. Step 4: Simplify right side
    139,680.95x = 14,653,438,919.31
  5. Step 5: Solve for x
    x = 14,653,438,919.31/139,680.95
  6. Step 6: Final answer
    x = 104,906.50

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1.5x scale

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.