Home / 281,106.15-421,659.23-81,433.05

Finding the Fourth Proportional to 281,106.15, 421,659.23 and 81,433.05

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Solution

The fourth proportional to 281,106.15, 421,659.23 and 81,433.05 is: 122,149.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,106.15 : 421,659.23 = 81,433.05 : x
  2. Step 2: Convert to fraction form
    281,106.15/421,659.23 = 81,433.05/x
  3. Step 3: Cross multiply
    281,106.15x = 421,659.23 × 81,433.05
  4. Step 4: Simplify right side
    281,106.15x = 34,336,996,752.39
  5. Step 5: Solve for x
    x = 34,336,996,752.39/281,106.15
  6. Step 6: Final answer
    x = 122,149.58

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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.