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Finding the Fourth Proportional to 74,942.60, 112,370.70 and 28,200.20

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Solution

The fourth proportional to 74,942.60, 112,370.70 and 28,200.20 is: 42,284.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,942.60 : 112,370.70 = 28,200.20 : x
  2. Step 2: Convert to fraction form
    74,942.60/112,370.70 = 28,200.20/x
  3. Step 3: Cross multiply
    74,942.60x = 112,370.70 × 28,200.20
  4. Step 4: Simplify right side
    74,942.60x = 3,168,876,214.14
  5. Step 5: Solve for x
    x = 3,168,876,214.14/74,942.60
  6. Step 6: Final answer
    x = 42,284.04

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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.