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Finding the Fourth Proportional to 72,357.88, 108,449.34 and 37,278.40

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Solution

The fourth proportional to 72,357.88, 108,449.34 and 37,278.40 is: 55,872.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,357.88 : 108,449.34 = 37,278.40 : x
  2. Step 2: Convert to fraction form
    72,357.88/108,449.34 = 37,278.40/x
  3. Step 3: Cross multiply
    72,357.88x = 108,449.34 × 37,278.40
  4. Step 4: Simplify right side
    72,357.88x = 4,042,817,876.26
  5. Step 5: Solve for x
    x = 4,042,817,876.26/72,357.88
  6. Step 6: Final answer
    x = 55,872.53

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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.