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Finding the Fourth Proportional to 151,817.99, 227,865.87 and 76,989.78

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Solution

The fourth proportional to 151,817.99, 227,865.87 and 76,989.78 is: 115,555.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,817.99 : 227,865.87 = 76,989.78 : x
  2. Step 2: Convert to fraction form
    151,817.99/227,865.87 = 76,989.78/x
  3. Step 3: Cross multiply
    151,817.99x = 227,865.87 × 76,989.78
  4. Step 4: Simplify right side
    151,817.99x = 17,543,343,200.81
  5. Step 5: Solve for x
    x = 17,543,343,200.81/151,817.99
  6. Step 6: Final answer
    x = 115,555.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.