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Finding the Fourth Proportional to 72,532.98, 100,090.17 and 40,269.45

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Solution

The fourth proportional to 72,532.98, 100,090.17 and 40,269.45 is: 55,568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,532.98 : 100,090.17 = 40,269.45 : x
  2. Step 2: Convert to fraction form
    72,532.98/100,090.17 = 40,269.45/x
  3. Step 3: Cross multiply
    72,532.98x = 100,090.17 × 40,269.45
  4. Step 4: Simplify right side
    72,532.98x = 4,030,576,096.31
  5. Step 5: Solve for x
    x = 4,030,576,096.31/72,532.98
  6. Step 6: Final answer
    x = 55,568.87

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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.