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Finding the Fourth Proportional to 159,321.21, 219,837.51 and 91,325.67

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Solution

The fourth proportional to 159,321.21, 219,837.51 and 91,325.67 is: 126,014.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,321.21 : 219,837.51 = 91,325.67 : x
  2. Step 2: Convert to fraction form
    159,321.21/219,837.51 = 91,325.67/x
  3. Step 3: Cross multiply
    159,321.21x = 219,837.51 × 91,325.67
  4. Step 4: Simplify right side
    159,321.21x = 20,076,807,891.88
  5. Step 5: Solve for x
    x = 20,076,807,891.88/159,321.21
  6. Step 6: Final answer
    x = 126,014.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.