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Finding the Fourth Proportional to 80,858.34, 121,212.99 and 74,216.34

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Solution

The fourth proportional to 80,858.34, 121,212.99 and 74,216.34 is: 111,256.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,858.34 : 121,212.99 = 74,216.34 : x
  2. Step 2: Convert to fraction form
    80,858.34/121,212.99 = 74,216.34/x
  3. Step 3: Cross multiply
    80,858.34x = 121,212.99 × 74,216.34
  4. Step 4: Simplify right side
    80,858.34x = 8,995,984,478.26
  5. Step 5: Solve for x
    x = 8,995,984,478.26/80,858.34
  6. Step 6: Final answer
    x = 111,256.11

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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.