Home / 142,396.48-196,490.40-78,734.56

Finding the Fourth Proportional to 142,396.48, 196,490.40 and 78,734.56

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Solution

The fourth proportional to 142,396.48, 196,490.40 and 78,734.56 is: 108,644.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,396.48 : 196,490.40 = 78,734.56 : x
  2. Step 2: Convert to fraction form
    142,396.48/196,490.40 = 78,734.56/x
  3. Step 3: Cross multiply
    142,396.48x = 196,490.40 × 78,734.56
  4. Step 4: Simplify right side
    142,396.48x = 15,470,585,188.22
  5. Step 5: Solve for x
    x = 15,470,585,188.22/142,396.48
  6. Step 6: Final answer
    x = 108,644.44

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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.