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Finding the Fourth Proportional to 72,991.38, 100,746.45 and 41,178.73

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Solution

The fourth proportional to 72,991.38, 100,746.45 and 41,178.73 is: 56,837.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,991.38 : 100,746.45 = 41,178.73 : x
  2. Step 2: Convert to fraction form
    72,991.38/100,746.45 = 41,178.73/x
  3. Step 3: Cross multiply
    72,991.38x = 100,746.45 × 41,178.73
  4. Step 4: Simplify right side
    72,991.38x = 4,148,610,863.01
  5. Step 5: Solve for x
    x = 4,148,610,863.01/72,991.38
  6. Step 6: Final answer
    x = 56,837.00

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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.