Home / 142,039.88-196,009.31-78,376.85

Finding the Fourth Proportional to 142,039.88, 196,009.31 and 78,376.85

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Solution

The fourth proportional to 142,039.88, 196,009.31 and 78,376.85 is: 108,156.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,039.88 : 196,009.31 = 78,376.85 : x
  2. Step 2: Convert to fraction form
    142,039.88/196,009.31 = 78,376.85/x
  3. Step 3: Cross multiply
    142,039.88x = 196,009.31 × 78,376.85
  4. Step 4: Simplify right side
    142,039.88x = 15,362,591,896.59
  5. Step 5: Solve for x
    x = 15,362,591,896.59/142,039.88
  6. Step 6: Final answer
    x = 108,156.89

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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.