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Finding the Fourth Proportional to 281,321.28, 421,980.60 and 115,109.28

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Solution

The fourth proportional to 281,321.28, 421,980.60 and 115,109.28 is: 172,663.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,321.28 : 421,980.60 = 115,109.28 : x
  2. Step 2: Convert to fraction form
    281,321.28/421,980.60 = 115,109.28/x
  3. Step 3: Cross multiply
    281,321.28x = 421,980.60 × 115,109.28
  4. Step 4: Simplify right side
    281,321.28x = 48,573,883,039.97
  5. Step 5: Solve for x
    x = 48,573,883,039.97/281,321.28
  6. Step 6: Final answer
    x = 172,663.38

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1.5x scale

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.