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Finding the Fourth Proportional to 72,201.96, 99,638.64 and 40,371.39

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Solution

The fourth proportional to 72,201.96, 99,638.64 and 40,371.39 is: 55,712.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,201.96 : 99,638.64 = 40,371.39 : x
  2. Step 2: Convert to fraction form
    72,201.96/99,638.64 = 40,371.39/x
  3. Step 3: Cross multiply
    72,201.96x = 99,638.64 × 40,371.39
  4. Step 4: Simplify right side
    72,201.96x = 4,022,550,394.51
  5. Step 5: Solve for x
    x = 4,022,550,394.51/72,201.96
  6. Step 6: Final answer
    x = 55,712.48

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1.5x scale

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.