Home / 281,086.02-421,690.59-81,414.54

Finding the Fourth Proportional to 281,086.02, 421,690.59 and 81,414.54

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Solution

The fourth proportional to 281,086.02, 421,690.59 and 81,414.54 is: 122,139.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,086.02 : 421,690.59 = 81,414.54 : x
  2. Step 2: Convert to fraction form
    281,086.02/421,690.59 = 81,414.54/x
  3. Step 3: Cross multiply
    281,086.02x = 421,690.59 × 81,414.54
  4. Step 4: Simplify right side
    281,086.02x = 34,331,745,407.18
  5. Step 5: Solve for x
    x = 34,331,745,407.18/281,086.02
  6. Step 6: Final answer
    x = 122,139.64

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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.