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Finding the Fourth Proportional to 281,201.10, 421,801.65 and 91,661.10

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Solution

The fourth proportional to 281,201.10, 421,801.65 and 91,661.10 is: 137,491.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,201.10 : 421,801.65 = 91,661.10 : x
  2. Step 2: Convert to fraction form
    281,201.10/421,801.65 = 91,661.10/x
  3. Step 3: Cross multiply
    281,201.10x = 421,801.65 × 91,661.10
  4. Step 4: Simplify right side
    281,201.10x = 38,662,803,220.82
  5. Step 5: Solve for x
    x = 38,662,803,220.82/281,201.10
  6. Step 6: Final answer
    x = 137,491.65

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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.