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Finding the Fourth Proportional to 84,628.50, 126,948.87 and 28,468.36

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Solution

The fourth proportional to 84,628.50, 126,948.87 and 28,468.36 is: 42,704.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,628.50 : 126,948.87 = 28,468.36 : x
  2. Step 2: Convert to fraction form
    84,628.50/126,948.87 = 28,468.36/x
  3. Step 3: Cross multiply
    84,628.50x = 126,948.87 × 28,468.36
  4. Step 4: Simplify right side
    84,628.50x = 3,614,026,291.44
  5. Step 5: Solve for x
    x = 3,614,026,291.44/84,628.50
  6. Step 6: Final answer
    x = 42,704.60

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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.