Home / 142,485.26-196,628.85-78,821.69

Finding the Fourth Proportional to 142,485.26, 196,628.85 and 78,821.69

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Solution

The fourth proportional to 142,485.26, 196,628.85 and 78,821.69 is: 108,773.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,485.26 : 196,628.85 = 78,821.69 : x
  2. Step 2: Convert to fraction form
    142,485.26/196,628.85 = 78,821.69/x
  3. Step 3: Cross multiply
    142,485.26x = 196,628.85 × 78,821.69
  4. Step 4: Simplify right side
    142,485.26x = 15,498,617,276.61
  5. Step 5: Solve for x
    x = 15,498,617,276.61/142,485.26
  6. Step 6: Final answer
    x = 108,773.48

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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.