Home / 142,011.77-195,976.87-78,351.44

Finding the Fourth Proportional to 142,011.77, 195,976.87 and 78,351.44

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Solution

The fourth proportional to 142,011.77, 195,976.87 and 78,351.44 is: 108,125.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,011.77 : 195,976.87 = 78,351.44 : x
  2. Step 2: Convert to fraction form
    142,011.77/195,976.87 = 78,351.44/x
  3. Step 3: Cross multiply
    142,011.77x = 195,976.87 × 78,351.44
  4. Step 4: Simplify right side
    142,011.77x = 15,355,068,795.43
  5. Step 5: Solve for x
    x = 15,355,068,795.43/142,011.77
  6. Step 6: Final answer
    x = 108,125.33

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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.