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Finding the Fourth Proportional to 265,138, 365,890.50 and 145,906

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Solution

The fourth proportional to 265,138, 365,890.50 and 145,906 is: 201,350.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,138 : 365,890.50 = 145,906 : x
  2. Step 2: Convert to fraction form
    265,138/365,890.50 = 145,906/x
  3. Step 3: Cross multiply
    265,138x = 365,890.50 × 145,906
  4. Step 4: Simplify right side
    265,138x = 53,385,619,293
  5. Step 5: Solve for x
    x = 53,385,619,293/265,138
  6. Step 6: Final answer
    x = 201,350.31

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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.