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Finding the Fourth Proportional to 72,998.47, 100,737.61 and 39,464.47

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Solution

The fourth proportional to 72,998.47, 100,737.61 and 39,464.47 is: 54,460.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,998.47 : 100,737.61 = 39,464.47 : x
  2. Step 2: Convert to fraction form
    72,998.47/100,737.61 = 39,464.47/x
  3. Step 3: Cross multiply
    72,998.47x = 100,737.61 × 39,464.47
  4. Step 4: Simplify right side
    72,998.47x = 3,975,556,387.72
  5. Step 5: Solve for x
    x = 3,975,556,387.72/72,998.47
  6. Step 6: Final answer
    x = 54,460.82

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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.