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Finding the Fourth Proportional to 53,969.20, 80,953.80 and 47,408.20

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Solution

The fourth proportional to 53,969.20, 80,953.80 and 47,408.20 is: 71,112.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,969.20 : 80,953.80 = 47,408.20 : x
  2. Step 2: Convert to fraction form
    53,969.20/80,953.80 = 47,408.20/x
  3. Step 3: Cross multiply
    53,969.20x = 80,953.80 × 47,408.20
  4. Step 4: Simplify right side
    53,969.20x = 3,837,873,941.16
  5. Step 5: Solve for x
    x = 3,837,873,941.16/53,969.20
  6. Step 6: Final answer
    x = 71,112.30

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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.