Home / 142,653.43-196,861.73-78,991.23

Finding the Fourth Proportional to 142,653.43, 196,861.73 and 78,991.23

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Solution

The fourth proportional to 142,653.43, 196,861.73 and 78,991.23 is: 109,007.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,653.43 : 196,861.73 = 78,991.23 : x
  2. Step 2: Convert to fraction form
    142,653.43/196,861.73 = 78,991.23/x
  3. Step 3: Cross multiply
    142,653.43x = 196,861.73 × 78,991.23
  4. Step 4: Simplify right side
    142,653.43x = 15,550,349,797.67
  5. Step 5: Solve for x
    x = 15,550,349,797.67/142,653.43
  6. Step 6: Final answer
    x = 109,007.89

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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.