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Finding the Fourth Proportional to 281,299.40, 421,950.86 and 115,087.40

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Solution

The fourth proportional to 281,299.40, 421,950.86 and 115,087.40 is: 172,631.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,299.40 : 421,950.86 = 115,087.40 : x
  2. Step 2: Convert to fraction form
    281,299.40/421,950.86 = 115,087.40/x
  3. Step 3: Cross multiply
    281,299.40x = 421,950.86 × 115,087.40
  4. Step 4: Simplify right side
    281,299.40x = 48,561,227,405.16
  5. Step 5: Solve for x
    x = 48,561,227,405.16/281,299.40
  6. Step 6: Final answer
    x = 172,631.82

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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.