Home / 281,389.26-421,956.30-121,389.72

Finding the Fourth Proportional to 281,389.26, 421,956.30 and 121,389.72

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Solution

The fourth proportional to 281,389.26, 421,956.30 and 121,389.72 is: 182,029.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,389.26 : 421,956.30 = 121,389.72 : x
  2. Step 2: Convert to fraction form
    281,389.26/421,956.30 = 121,389.72/x
  3. Step 3: Cross multiply
    281,389.26x = 421,956.30 × 121,389.72
  4. Step 4: Simplify right side
    281,389.26x = 51,221,157,109.24
  5. Step 5: Solve for x
    x = 51,221,157,109.24/281,389.26
  6. Step 6: Final answer
    x = 182,029.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.