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Finding the Fourth Proportional to 281,208.91, 421,857.36 and 91,625.28

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Solution

The fourth proportional to 281,208.91, 421,857.36 and 91,625.28 is: 137,452.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,208.91 : 421,857.36 = 91,625.28 : x
  2. Step 2: Convert to fraction form
    281,208.91/421,857.36 = 91,625.28/x
  3. Step 3: Cross multiply
    281,208.91x = 421,857.36 × 91,625.28
  4. Step 4: Simplify right side
    281,208.91x = 38,652,798,730.06
  5. Step 5: Solve for x
    x = 38,652,798,730.06/281,208.91
  6. Step 6: Final answer
    x = 137,452.25

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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.