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Finding the Fourth Proportional to 72,464.82, 99,999.90 and 40,633.02

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Solution

The fourth proportional to 72,464.82, 99,999.90 and 40,633.02 is: 56,072.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,464.82 : 99,999.90 = 40,633.02 : x
  2. Step 2: Convert to fraction form
    72,464.82/99,999.90 = 40,633.02/x
  3. Step 3: Cross multiply
    72,464.82x = 99,999.90 × 40,633.02
  4. Step 4: Simplify right side
    72,464.82x = 4,063,297,936.70
  5. Step 5: Solve for x
    x = 4,063,297,936.70/72,464.82
  6. Step 6: Final answer
    x = 56,072.70

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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.