Home / 142,502.77-196,653-78,839.20

Finding the Fourth Proportional to 142,502.77, 196,653 and 78,839.20

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Solution

The fourth proportional to 142,502.77, 196,653 and 78,839.20 is: 108,797.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,502.77 : 196,653 = 78,839.20 : x
  2. Step 2: Convert to fraction form
    142,502.77/196,653 = 78,839.20/x
  3. Step 3: Cross multiply
    142,502.77x = 196,653 × 78,839.20
  4. Step 4: Simplify right side
    142,502.77x = 15,503,965,197.60
  5. Step 5: Solve for x
    x = 15,503,965,197.60/142,502.77
  6. Step 6: Final answer
    x = 108,797.64

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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.