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Finding the Fourth Proportional to 281,321.58, 421,995.99 and 91,781.58

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Solution

The fourth proportional to 281,321.58, 421,995.99 and 91,781.58 is: 137,676.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,321.58 : 421,995.99 = 91,781.58 : x
  2. Step 2: Convert to fraction form
    281,321.58/421,995.99 = 91,781.58/x
  3. Step 3: Cross multiply
    281,321.58x = 421,995.99 × 91,781.58
  4. Step 4: Simplify right side
    281,321.58x = 38,731,458,715.86
  5. Step 5: Solve for x
    x = 38,731,458,715.86/281,321.58
  6. Step 6: Final answer
    x = 137,676.81

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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.