Home / 142,691.36-196,906.46-78,157.26

Finding the Fourth Proportional to 142,691.36, 196,906.46 and 78,157.26

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Solution

The fourth proportional to 142,691.36, 196,906.46 and 78,157.26 is: 107,852.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,691.36 : 196,906.46 = 78,157.26 : x
  2. Step 2: Convert to fraction form
    142,691.36/196,906.46 = 78,157.26/x
  3. Step 3: Cross multiply
    142,691.36x = 196,906.46 × 78,157.26
  4. Step 4: Simplify right side
    142,691.36x = 15,389,668,999.11
  5. Step 5: Solve for x
    x = 15,389,668,999.11/142,691.36
  6. Step 6: Final answer
    x = 107,852.85

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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.