Home / 281,109.16-421,663.77-81,429.64

Finding the Fourth Proportional to 281,109.16, 421,663.77 and 81,429.64

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Solution

The fourth proportional to 281,109.16, 421,663.77 and 81,429.64 is: 122,144.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,109.16 : 421,663.77 = 81,429.64 : x
  2. Step 2: Convert to fraction form
    281,109.16/421,663.77 = 81,429.64/x
  3. Step 3: Cross multiply
    281,109.16x = 421,663.77 × 81,429.64
  4. Step 4: Simplify right side
    281,109.16x = 34,335,928,992.14
  5. Step 5: Solve for x
    x = 34,335,928,992.14/281,109.16
  6. Step 6: Final answer
    x = 122,144.47

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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.