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Finding the Fourth Proportional to 84,493.40, 126,736.05 and 28,334.30

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Solution

The fourth proportional to 84,493.40, 126,736.05 and 28,334.30 is: 42,500.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,493.40 : 126,736.05 = 28,334.30 : x
  2. Step 2: Convert to fraction form
    84,493.40/126,736.05 = 28,334.30/x
  3. Step 3: Cross multiply
    84,493.40x = 126,736.05 × 28,334.30
  4. Step 4: Simplify right side
    84,493.40x = 3,590,977,261.52
  5. Step 5: Solve for x
    x = 3,590,977,261.52/84,493.40
  6. Step 6: Final answer
    x = 42,500.09

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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.