Home / 142,391.37-196,504.04-78,731.45

Finding the Fourth Proportional to 142,391.37, 196,504.04 and 78,731.45

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Solution

The fourth proportional to 142,391.37, 196,504.04 and 78,731.45 is: 108,651.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,391.37 : 196,504.04 = 78,731.45 : x
  2. Step 2: Convert to fraction form
    142,391.37/196,504.04 = 78,731.45/x
  3. Step 3: Cross multiply
    142,391.37x = 196,504.04 × 78,731.45
  4. Step 4: Simplify right side
    142,391.37x = 15,471,046,623.88
  5. Step 5: Solve for x
    x = 15,471,046,623.88/142,391.37
  6. Step 6: Final answer
    x = 108,651.58

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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.