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Finding the Fourth Proportional to 117,739.20, 176,205.60 and 71,025.60

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Solution

The fourth proportional to 117,739.20, 176,205.60 and 71,025.60 is: 106,295.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,739.20 : 176,205.60 = 71,025.60 : x
  2. Step 2: Convert to fraction form
    117,739.20/176,205.60 = 71,025.60/x
  3. Step 3: Cross multiply
    117,739.20x = 176,205.60 × 71,025.60
  4. Step 4: Simplify right side
    117,739.20x = 12,515,108,463.36
  5. Step 5: Solve for x
    x = 12,515,108,463.36/117,739.20
  6. Step 6: Final answer
    x = 106,295.17

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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.