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Finding the Fourth Proportional to 111,145.50, 166,718.52 and 28,039.50

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Solution

The fourth proportional to 111,145.50, 166,718.52 and 28,039.50 is: 42,059.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,145.50 : 166,718.52 = 28,039.50 : x
  2. Step 2: Convert to fraction form
    111,145.50/166,718.52 = 28,039.50/x
  3. Step 3: Cross multiply
    111,145.50x = 166,718.52 × 28,039.50
  4. Step 4: Simplify right side
    111,145.50x = 4,674,703,941.54
  5. Step 5: Solve for x
    x = 4,674,703,941.54/111,145.50
  6. Step 6: Final answer
    x = 42,059.32

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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.