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Finding the Fourth Proportional to 72,561.44, 108,821.48 and 28,178.70

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Solution

The fourth proportional to 72,561.44, 108,821.48 and 28,178.70 is: 42,260.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,561.44 : 108,821.48 = 28,178.70 : x
  2. Step 2: Convert to fraction form
    72,561.44/108,821.48 = 28,178.70/x
  3. Step 3: Cross multiply
    72,561.44x = 108,821.48 × 28,178.70
  4. Step 4: Simplify right side
    72,561.44x = 3,066,447,697.58
  5. Step 5: Solve for x
    x = 3,066,447,697.58/72,561.44
  6. Step 6: Final answer
    x = 42,260.02

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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.