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Finding the Fourth Proportional to 53,309.40, 79,891.20 and 35,489.40

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Solution

The fourth proportional to 53,309.40, 79,891.20 and 35,489.40 is: 53,185.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,309.40 : 79,891.20 = 35,489.40 : x
  2. Step 2: Convert to fraction form
    53,309.40/79,891.20 = 35,489.40/x
  3. Step 3: Cross multiply
    53,309.40x = 79,891.20 × 35,489.40
  4. Step 4: Simplify right side
    53,309.40x = 2,835,290,753.28
  5. Step 5: Solve for x
    x = 2,835,290,753.28/53,309.40
  6. Step 6: Final answer
    x = 53,185.57

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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.