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Finding the Fourth Proportional to 72,393.20, 108,560.64 and 30,245.66

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Solution

The fourth proportional to 72,393.20, 108,560.64 and 30,245.66 is: 45,356.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,393.20 : 108,560.64 = 30,245.66 : x
  2. Step 2: Convert to fraction form
    72,393.20/108,560.64 = 30,245.66/x
  3. Step 3: Cross multiply
    72,393.20x = 108,560.64 × 30,245.66
  4. Step 4: Simplify right side
    72,393.20x = 3,283,488,206.82
  5. Step 5: Solve for x
    x = 3,283,488,206.82/72,393.20
  6. Step 6: Final answer
    x = 45,356.31

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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.