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Finding the Fourth Proportional to 72,579.73, 108,841.61 and 28,200.64

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Solution

The fourth proportional to 72,579.73, 108,841.61 and 28,200.64 is: 42,290.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,579.73 : 108,841.61 = 28,200.64 : x
  2. Step 2: Convert to fraction form
    72,579.73/108,841.61 = 28,200.64/x
  3. Step 3: Cross multiply
    72,579.73x = 108,841.61 × 28,200.64
  4. Step 4: Simplify right side
    72,579.73x = 3,069,402,919.63
  5. Step 5: Solve for x
    x = 3,069,402,919.63/72,579.73
  6. Step 6: Final answer
    x = 42,290.08

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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.