Home / 139,230.24-192,135.66-78,812.34

Finding the Fourth Proportional to 139,230.24, 192,135.66 and 78,812.34

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Solution

The fourth proportional to 139,230.24, 192,135.66 and 78,812.34 is: 108,759.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,230.24 : 192,135.66 = 78,812.34 : x
  2. Step 2: Convert to fraction form
    139,230.24/192,135.66 = 78,812.34/x
  3. Step 3: Cross multiply
    139,230.24x = 192,135.66 × 78,812.34
  4. Step 4: Simplify right side
    139,230.24x = 15,142,660,962.04
  5. Step 5: Solve for x
    x = 15,142,660,962.04/139,230.24
  6. Step 6: Final answer
    x = 108,759.86

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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.