Home / 142,039.64-196,015.26-78,379.28

Finding the Fourth Proportional to 142,039.64, 196,015.26 and 78,379.28

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Solution

The fourth proportional to 142,039.64, 196,015.26 and 78,379.28 is: 108,163.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,039.64 : 196,015.26 = 78,379.28 : x
  2. Step 2: Convert to fraction form
    142,039.64/196,015.26 = 78,379.28/x
  3. Step 3: Cross multiply
    142,039.64x = 196,015.26 × 78,379.28
  4. Step 4: Simplify right side
    142,039.64x = 15,363,534,947.81
  5. Step 5: Solve for x
    x = 15,363,534,947.81/142,039.64
  6. Step 6: Final answer
    x = 108,163.71

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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.