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Finding the Fourth Proportional to 72,579, 108,868.58 and 28,803

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Solution

The fourth proportional to 72,579, 108,868.58 and 28,803 is: 43,204.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,579 : 108,868.58 = 28,803 : x
  2. Step 2: Convert to fraction form
    72,579/108,868.58 = 28,803/x
  3. Step 3: Cross multiply
    72,579x = 108,868.58 × 28,803
  4. Step 4: Simplify right side
    72,579x = 3,135,741,709.74
  5. Step 5: Solve for x
    x = 3,135,741,709.74/72,579
  6. Step 6: Final answer
    x = 43,204.53

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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.