Home / 139,317.11-192,260.19-78,887.57

Finding the Fourth Proportional to 139,317.11, 192,260.19 and 78,887.57

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Solution

The fourth proportional to 139,317.11, 192,260.19 and 78,887.57 is: 108,866.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,317.11 : 192,260.19 = 78,887.57 : x
  2. Step 2: Convert to fraction form
    139,317.11/192,260.19 = 78,887.57/x
  3. Step 3: Cross multiply
    139,317.11x = 192,260.19 × 78,887.57
  4. Step 4: Simplify right side
    139,317.11x = 15,166,938,235.54
  5. Step 5: Solve for x
    x = 15,166,938,235.54/139,317.11
  6. Step 6: Final answer
    x = 108,866.30

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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.