Home / 142,112.88-196,115.60-78,450.52

Finding the Fourth Proportional to 142,112.88, 196,115.60 and 78,450.52

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Solution

The fourth proportional to 142,112.88, 196,115.60 and 78,450.52 is: 108,261.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,112.88 : 196,115.60 = 78,450.52 : x
  2. Step 2: Convert to fraction form
    142,112.88/196,115.60 = 78,450.52/x
  3. Step 3: Cross multiply
    142,112.88x = 196,115.60 × 78,450.52
  4. Step 4: Simplify right side
    142,112.88x = 15,385,370,800.11
  5. Step 5: Solve for x
    x = 15,385,370,800.11/142,112.88
  6. Step 6: Final answer
    x = 108,261.62

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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.