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Finding the Fourth Proportional to 72,598.79, 100,183.74 and 40,769.03

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Solution

The fourth proportional to 72,598.79, 100,183.74 and 40,769.03 is: 56,259.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,598.79 : 100,183.74 = 40,769.03 : x
  2. Step 2: Convert to fraction form
    72,598.79/100,183.74 = 40,769.03/x
  3. Step 3: Cross multiply
    72,598.79x = 100,183.74 × 40,769.03
  4. Step 4: Simplify right side
    72,598.79x = 4,084,393,901.57
  5. Step 5: Solve for x
    x = 4,084,393,901.57/72,598.79
  6. Step 6: Final answer
    x = 56,259.81

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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.