Home / 139,440.33-192,403.89-78,998.49

Finding the Fourth Proportional to 139,440.33, 192,403.89 and 78,998.49

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Solution

The fourth proportional to 139,440.33, 192,403.89 and 78,998.49 is: 109,004.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,440.33 : 192,403.89 = 78,998.49 : x
  2. Step 2: Convert to fraction form
    139,440.33/192,403.89 = 78,998.49/x
  3. Step 3: Cross multiply
    139,440.33x = 192,403.89 × 78,998.49
  4. Step 4: Simplify right side
    139,440.33x = 15,199,616,780.13
  5. Step 5: Solve for x
    x = 15,199,616,780.13/139,440.33
  6. Step 6: Final answer
    x = 109,004.45

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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.