Home / 142,664.92-196,873.12-78,131.32

Finding the Fourth Proportional to 142,664.92, 196,873.12 and 78,131.32

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Solution

The fourth proportional to 142,664.92, 196,873.12 and 78,131.32 is: 107,818.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,664.92 : 196,873.12 = 78,131.32 : x
  2. Step 2: Convert to fraction form
    142,664.92/196,873.12 = 78,131.32/x
  3. Step 3: Cross multiply
    142,664.92x = 196,873.12 × 78,131.32
  4. Step 4: Simplify right side
    142,664.92x = 15,381,956,738.12
  5. Step 5: Solve for x
    x = 15,381,956,738.12/142,664.92
  6. Step 6: Final answer
    x = 107,818.77

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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.