Home / 142,110.80-196,107.72-78,448.40

Finding the Fourth Proportional to 142,110.80, 196,107.72 and 78,448.40

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Solution

The fourth proportional to 142,110.80, 196,107.72 and 78,448.40 is: 108,255.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,110.80 : 196,107.72 = 78,448.40 : x
  2. Step 2: Convert to fraction form
    142,110.80/196,107.72 = 78,448.40/x
  3. Step 3: Cross multiply
    142,110.80x = 196,107.72 × 78,448.40
  4. Step 4: Simplify right side
    142,110.80x = 15,384,336,861.65
  5. Step 5: Solve for x
    x = 15,384,336,861.65/142,110.80
  6. Step 6: Final answer
    x = 108,255.93

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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.