Home / 142,078.86-196,067.86-78,416.66

Finding the Fourth Proportional to 142,078.86, 196,067.86 and 78,416.66

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Solution

The fourth proportional to 142,078.86, 196,067.86 and 78,416.66 is: 108,214.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,078.86 : 196,067.86 = 78,416.66 : x
  2. Step 2: Convert to fraction form
    142,078.86/196,067.86 = 78,416.66/x
  3. Step 3: Cross multiply
    142,078.86x = 196,067.86 × 78,416.66
  4. Step 4: Simplify right side
    142,078.86x = 15,374,987,008.68
  5. Step 5: Solve for x
    x = 15,374,987,008.68/142,078.86
  6. Step 6: Final answer
    x = 108,214.46

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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.