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Finding the Fourth Proportional to 72,461.70, 99,997.06 and 40,201.22

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Solution

The fourth proportional to 72,461.70, 99,997.06 and 40,201.22 is: 55,477.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,461.70 : 99,997.06 = 40,201.22 : x
  2. Step 2: Convert to fraction form
    72,461.70/99,997.06 = 40,201.22/x
  3. Step 3: Cross multiply
    72,461.70x = 99,997.06 × 40,201.22
  4. Step 4: Simplify right side
    72,461.70x = 4,020,003,207.92
  5. Step 5: Solve for x
    x = 4,020,003,207.92/72,461.70
  6. Step 6: Final answer
    x = 55,477.63

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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.