Home / 142,728.26-196,956.50-78,184.58

Finding the Fourth Proportional to 142,728.26, 196,956.50 and 78,184.58

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Solution

The fourth proportional to 142,728.26, 196,956.50 and 78,184.58 is: 107,890.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,728.26 : 196,956.50 = 78,184.58 : x
  2. Step 2: Convert to fraction form
    142,728.26/196,956.50 = 78,184.58/x
  3. Step 3: Cross multiply
    142,728.26x = 196,956.50 × 78,184.58
  4. Step 4: Simplify right side
    142,728.26x = 15,398,959,855.06
  5. Step 5: Solve for x
    x = 15,398,959,855.06/142,728.26
  6. Step 6: Final answer
    x = 107,890.06

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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.