Home / 142,351.47-196,446.21-78,690.33

Finding the Fourth Proportional to 142,351.47, 196,446.21 and 78,690.33

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Solution

The fourth proportional to 142,351.47, 196,446.21 and 78,690.33 is: 108,593.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,351.47 : 196,446.21 = 78,690.33 : x
  2. Step 2: Convert to fraction form
    142,351.47/196,446.21 = 78,690.33/x
  3. Step 3: Cross multiply
    142,351.47x = 196,446.21 × 78,690.33
  4. Step 4: Simplify right side
    142,351.47x = 15,458,417,092.15
  5. Step 5: Solve for x
    x = 15,458,417,092.15/142,351.47
  6. Step 6: Final answer
    x = 108,593.31

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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.