Home / 142,039.24-196,012.44-78,375.64

Finding the Fourth Proportional to 142,039.24, 196,012.44 and 78,375.64

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Solution

The fourth proportional to 142,039.24, 196,012.44 and 78,375.64 is: 108,157.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,039.24 : 196,012.44 = 78,375.64 : x
  2. Step 2: Convert to fraction form
    142,039.24/196,012.44 = 78,375.64/x
  3. Step 3: Cross multiply
    142,039.24x = 196,012.44 × 78,375.64
  4. Step 4: Simplify right side
    142,039.24x = 15,362,600,432.96
  5. Step 5: Solve for x
    x = 15,362,600,432.96/142,039.24
  6. Step 6: Final answer
    x = 108,157.44

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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.