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Finding the Fourth Proportional to 72,362.07, 99,920.52 and 54,425.84

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Solution

The fourth proportional to 72,362.07, 99,920.52 and 54,425.84 is: 75,153.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,362.07 : 99,920.52 = 54,425.84 : x
  2. Step 2: Convert to fraction form
    72,362.07/99,920.52 = 54,425.84/x
  3. Step 3: Cross multiply
    72,362.07x = 99,920.52 × 54,425.84
  4. Step 4: Simplify right side
    72,362.07x = 5,438,257,734.63
  5. Step 5: Solve for x
    x = 5,438,257,734.63/72,362.07
  6. Step 6: Final answer
    x = 75,153.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.