Home / 142,418.79-196,539.21-78,760.89

Finding the Fourth Proportional to 142,418.79, 196,539.21 and 78,760.89

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Solution

The fourth proportional to 142,418.79, 196,539.21 and 78,760.89 is: 108,690.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,418.79 : 196,539.21 = 78,760.89 : x
  2. Step 2: Convert to fraction form
    142,418.79/196,539.21 = 78,760.89/x
  3. Step 3: Cross multiply
    142,418.79x = 196,539.21 × 78,760.89
  4. Step 4: Simplify right side
    142,418.79x = 15,479,603,099.50
  5. Step 5: Solve for x
    x = 15,479,603,099.50/142,418.79
  6. Step 6: Final answer
    x = 108,690.74

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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.