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Finding the Fourth Proportional to 72,298.98, 99,771.62 and 40,467.87

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Solution

The fourth proportional to 72,298.98, 99,771.62 and 40,467.87 is: 55,845.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,298.98 : 99,771.62 = 40,467.87 : x
  2. Step 2: Convert to fraction form
    72,298.98/99,771.62 = 40,467.87/x
  3. Step 3: Cross multiply
    72,298.98x = 99,771.62 × 40,467.87
  4. Step 4: Simplify right side
    72,298.98x = 4,037,544,745.51
  5. Step 5: Solve for x
    x = 4,037,544,745.51/72,298.98
  6. Step 6: Final answer
    x = 55,845.11

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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.