Home / 139,127.60-191,996.07-78,696.94

Finding the Fourth Proportional to 139,127.60, 191,996.07 and 78,696.94

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Solution

The fourth proportional to 139,127.60, 191,996.07 and 78,696.94 is: 108,601.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,127.60 : 191,996.07 = 78,696.94 : x
  2. Step 2: Convert to fraction form
    139,127.60/191,996.07 = 78,696.94/x
  3. Step 3: Cross multiply
    139,127.60x = 191,996.07 × 78,696.94
  4. Step 4: Simplify right side
    139,127.60x = 15,109,503,201.03
  5. Step 5: Solve for x
    x = 15,109,503,201.03/139,127.60
  6. Step 6: Final answer
    x = 108,601.77

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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.