Home / 142,035.80-196,009.20-78,373.58

Finding the Fourth Proportional to 142,035.80, 196,009.20 and 78,373.58

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Solution

The fourth proportional to 142,035.80, 196,009.20 and 78,373.58 is: 108,155.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,035.80 : 196,009.20 = 78,373.58 : x
  2. Step 2: Convert to fraction form
    142,035.80/196,009.20 = 78,373.58/x
  3. Step 3: Cross multiply
    142,035.80x = 196,009.20 × 78,373.58
  4. Step 4: Simplify right side
    142,035.80x = 15,361,942,716.94
  5. Step 5: Solve for x
    x = 15,361,942,716.94/142,035.80
  6. Step 6: Final answer
    x = 108,155.43

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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.