Home / 139,146.95-192,022.80-78,716.36

Finding the Fourth Proportional to 139,146.95, 192,022.80 and 78,716.36

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Solution

The fourth proportional to 139,146.95, 192,022.80 and 78,716.36 is: 108,628.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,146.95 : 192,022.80 = 78,716.36 : x
  2. Step 2: Convert to fraction form
    139,146.95/192,022.80 = 78,716.36/x
  3. Step 3: Cross multiply
    139,146.95x = 192,022.80 × 78,716.36
  4. Step 4: Simplify right side
    139,146.95x = 15,115,335,853.01
  5. Step 5: Solve for x
    x = 15,115,335,853.01/139,146.95
  6. Step 6: Final answer
    x = 108,628.58

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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.