Home / 139,204.88-192,091.20-78,772.40

Finding the Fourth Proportional to 139,204.88, 192,091.20 and 78,772.40

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Solution

The fourth proportional to 139,204.88, 192,091.20 and 78,772.40 is: 108,699.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,204.88 : 192,091.20 = 78,772.40 : x
  2. Step 2: Convert to fraction form
    139,204.88/192,091.20 = 78,772.40/x
  3. Step 3: Cross multiply
    139,204.88x = 192,091.20 × 78,772.40
  4. Step 4: Simplify right side
    139,204.88x = 15,131,484,842.88
  5. Step 5: Solve for x
    x = 15,131,484,842.88/139,204.88
  6. Step 6: Final answer
    x = 108,699.38

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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.