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Finding the Fourth Proportional to 72,579.86, 108,841.79 and 28,200.77

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Solution

The fourth proportional to 72,579.86, 108,841.79 and 28,200.77 is: 42,290.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,579.86 : 108,841.79 = 28,200.77 : x
  2. Step 2: Convert to fraction form
    72,579.86/108,841.79 = 28,200.77/x
  3. Step 3: Cross multiply
    72,579.86x = 108,841.79 × 28,200.77
  4. Step 4: Simplify right side
    72,579.86x = 3,069,421,812.47
  5. Step 5: Solve for x
    x = 3,069,421,812.47/72,579.86
  6. Step 6: Final answer
    x = 42,290.27

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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.