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Finding the Fourth Proportional to 53,786.40, 80,679.60 and 30,458.40

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Solution

The fourth proportional to 53,786.40, 80,679.60 and 30,458.40 is: 45,687.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,786.40 : 80,679.60 = 30,458.40 : x
  2. Step 2: Convert to fraction form
    53,786.40/80,679.60 = 30,458.40/x
  3. Step 3: Cross multiply
    53,786.40x = 80,679.60 × 30,458.40
  4. Step 4: Simplify right side
    53,786.40x = 2,457,371,528.64
  5. Step 5: Solve for x
    x = 2,457,371,528.64/53,786.40
  6. Step 6: Final answer
    x = 45,687.60

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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.