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Finding the Fourth Proportional to 72,795.96, 109,209.60 and 43,179.12

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Solution

The fourth proportional to 72,795.96, 109,209.60 and 43,179.12 is: 64,777.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,795.96 : 109,209.60 = 43,179.12 : x
  2. Step 2: Convert to fraction form
    72,795.96/109,209.60 = 43,179.12/x
  3. Step 3: Cross multiply
    72,795.96x = 109,209.60 × 43,179.12
  4. Step 4: Simplify right side
    72,795.96x = 4,715,574,423.55
  5. Step 5: Solve for x
    x = 4,715,574,423.55/72,795.96
  6. Step 6: Final answer
    x = 64,777.97

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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.