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Finding the Fourth Proportional to 74,940.60, 112,367.70 and 28,198.20

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Solution

The fourth proportional to 74,940.60, 112,367.70 and 28,198.20 is: 42,281.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,940.60 : 112,367.70 = 28,198.20 : x
  2. Step 2: Convert to fraction form
    74,940.60/112,367.70 = 28,198.20/x
  3. Step 3: Cross multiply
    74,940.60x = 112,367.70 × 28,198.20
  4. Step 4: Simplify right side
    74,940.60x = 3,168,566,878.14
  5. Step 5: Solve for x
    x = 3,168,566,878.14/74,940.60
  6. Step 6: Final answer
    x = 42,281.04

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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.