Home / 139,440.26-192,428.78-75,778.05

Finding the Fourth Proportional to 139,440.26, 192,428.78 and 75,778.05

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Solution

The fourth proportional to 139,440.26, 192,428.78 and 75,778.05 is: 104,574.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,440.26 : 192,428.78 = 75,778.05 : x
  2. Step 2: Convert to fraction form
    139,440.26/192,428.78 = 75,778.05/x
  3. Step 3: Cross multiply
    139,440.26x = 192,428.78 × 75,778.05
  4. Step 4: Simplify right side
    139,440.26x = 14,581,877,712.28
  5. Step 5: Solve for x
    x = 14,581,877,712.28/139,440.26
  6. Step 6: Final answer
    x = 104,574.37

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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.