Home / 142,502.80-196,653-78,839.28

Finding the Fourth Proportional to 142,502.80, 196,653 and 78,839.28

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Solution

The fourth proportional to 142,502.80, 196,653 and 78,839.28 is: 108,797.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,502.80 : 196,653 = 78,839.28 : x
  2. Step 2: Convert to fraction form
    142,502.80/196,653 = 78,839.28/x
  3. Step 3: Cross multiply
    142,502.80x = 196,653 × 78,839.28
  4. Step 4: Simplify right side
    142,502.80x = 15,503,980,929.84
  5. Step 5: Solve for x
    x = 15,503,980,929.84/142,502.80
  6. Step 6: Final answer
    x = 108,797.73

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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.