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Finding the Fourth Proportional to 281,246.88, 421,914.32 and 91,663.21

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Solution

The fourth proportional to 281,246.88, 421,914.32 and 91,663.21 is: 137,509.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,246.88 : 421,914.32 = 91,663.21 : x
  2. Step 2: Convert to fraction form
    281,246.88/421,914.32 = 91,663.21/x
  3. Step 3: Cross multiply
    281,246.88x = 421,914.32 × 91,663.21
  4. Step 4: Simplify right side
    281,246.88x = 38,674,021,328.98
  5. Step 5: Solve for x
    x = 38,674,021,328.98/281,246.88
  6. Step 6: Final answer
    x = 137,509.15

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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.