Home / 142,928.90-197,240.52-78,396.81

Finding the Fourth Proportional to 142,928.90, 197,240.52 and 78,396.81

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Solution

The fourth proportional to 142,928.90, 197,240.52 and 78,396.81 is: 108,186.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,928.90 : 197,240.52 = 78,396.81 : x
  2. Step 2: Convert to fraction form
    142,928.90/197,240.52 = 78,396.81/x
  3. Step 3: Cross multiply
    142,928.90x = 197,240.52 × 78,396.81
  4. Step 4: Simplify right side
    142,928.90x = 15,463,027,793.57
  5. Step 5: Solve for x
    x = 15,463,027,793.57/142,928.90
  6. Step 6: Final answer
    x = 108,186.85

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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.