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Finding the Fourth Proportional to 72,912.99, 109,344.43 and 35,448.94

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Solution

The fourth proportional to 72,912.99, 109,344.43 and 35,448.94 is: 53,161.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,912.99 : 109,344.43 = 35,448.94 : x
  2. Step 2: Convert to fraction form
    72,912.99/109,344.43 = 35,448.94/x
  3. Step 3: Cross multiply
    72,912.99x = 109,344.43 × 35,448.94
  4. Step 4: Simplify right side
    72,912.99x = 3,876,144,319.40
  5. Step 5: Solve for x
    x = 3,876,144,319.40/72,912.99
  6. Step 6: Final answer
    x = 53,161.23

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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.