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Finding the Fourth Proportional to 100,502.51, 150,775.64 and 30,380

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Solution

The fourth proportional to 100,502.51, 150,775.64 and 30,380 is: 45,576.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,502.51 : 150,775.64 = 30,380 : x
  2. Step 2: Convert to fraction form
    100,502.51/150,775.64 = 30,380/x
  3. Step 3: Cross multiply
    100,502.51x = 150,775.64 × 30,380
  4. Step 4: Simplify right side
    100,502.51x = 4,580,563,791.30
  5. Step 5: Solve for x
    x = 4,580,563,791.30/100,502.51
  6. Step 6: Final answer
    x = 45,576.61

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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.