Home / 139,376.11-192,341.10-78,945.25

Finding the Fourth Proportional to 139,376.11, 192,341.10 and 78,945.25

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Solution

The fourth proportional to 139,376.11, 192,341.10 and 78,945.25 is: 108,945.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,376.11 : 192,341.10 = 78,945.25 : x
  2. Step 2: Convert to fraction form
    139,376.11/192,341.10 = 78,945.25/x
  3. Step 3: Cross multiply
    139,376.11x = 192,341.10 × 78,945.25
  4. Step 4: Simplify right side
    139,376.11x = 15,184,416,224.78
  5. Step 5: Solve for x
    x = 15,184,416,224.78/139,376.11
  6. Step 6: Final answer
    x = 108,945.62

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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.