Home / 281,209.16-421,912.16-81,541.52

Finding the Fourth Proportional to 281,209.16, 421,912.16 and 81,541.52

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Solution

The fourth proportional to 281,209.16, 421,912.16 and 81,541.52 is: 122,340.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,209.16 : 421,912.16 = 81,541.52 : x
  2. Step 2: Convert to fraction form
    281,209.16/421,912.16 = 81,541.52/x
  3. Step 3: Cross multiply
    281,209.16x = 421,912.16 × 81,541.52
  4. Step 4: Simplify right side
    281,209.16x = 34,403,358,832.88
  5. Step 5: Solve for x
    x = 34,403,358,832.88/281,209.16
  6. Step 6: Final answer
    x = 122,340.82

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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.