Home / 142,004.88-195,965.64-78,345.36

Finding the Fourth Proportional to 142,004.88, 195,965.64 and 78,345.36

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Solution

The fourth proportional to 142,004.88, 195,965.64 and 78,345.36 is: 108,115.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,004.88 : 195,965.64 = 78,345.36 : x
  2. Step 2: Convert to fraction form
    142,004.88/195,965.64 = 78,345.36/x
  3. Step 3: Cross multiply
    142,004.88x = 195,965.64 × 78,345.36
  4. Step 4: Simplify right side
    142,004.88x = 15,352,998,613.43
  5. Step 5: Solve for x
    x = 15,352,998,613.43/142,004.88
  6. Step 6: Final answer
    x = 108,115.99

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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.