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Finding the Fourth Proportional to 117,940.80, 162,758.40 and 67,641.60

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Solution

The fourth proportional to 117,940.80, 162,758.40 and 67,641.60 is: 93,345.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,940.80 : 162,758.40 = 67,641.60 : x
  2. Step 2: Convert to fraction form
    117,940.80/162,758.40 = 67,641.60/x
  3. Step 3: Cross multiply
    117,940.80x = 162,758.40 × 67,641.60
  4. Step 4: Simplify right side
    117,940.80x = 11,009,238,589.44
  5. Step 5: Solve for x
    x = 11,009,238,589.44/117,940.80
  6. Step 6: Final answer
    x = 93,345.46

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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.