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Finding the Fourth Proportional to 72,438.63, 99,998.04 and 45,620.54

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Solution

The fourth proportional to 72,438.63, 99,998.04 and 45,620.54 is: 62,976.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,438.63 : 99,998.04 = 45,620.54 : x
  2. Step 2: Convert to fraction form
    72,438.63/99,998.04 = 45,620.54/x
  3. Step 3: Cross multiply
    72,438.63x = 99,998.04 × 45,620.54
  4. Step 4: Simplify right side
    72,438.63x = 4,561,964,583.74
  5. Step 5: Solve for x
    x = 4,561,964,583.74/72,438.63
  6. Step 6: Final answer
    x = 62,976.96

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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.