Home / 142,078.16-196,067.45-78,415.50

Finding the Fourth Proportional to 142,078.16, 196,067.45 and 78,415.50

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Solution

The fourth proportional to 142,078.16, 196,067.45 and 78,415.50 is: 108,213.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,078.16 : 196,067.45 = 78,415.50 : x
  2. Step 2: Convert to fraction form
    142,078.16/196,067.45 = 78,415.50/x
  3. Step 3: Cross multiply
    142,078.16x = 196,067.45 × 78,415.50
  4. Step 4: Simplify right side
    142,078.16x = 15,374,727,321.51
  5. Step 5: Solve for x
    x = 15,374,727,321.51/142,078.16
  6. Step 6: Final answer
    x = 108,213.16

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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.