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Finding the Fourth Proportional to 111,203.70, 166,805.55 and 81,752.10

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Solution

The fourth proportional to 111,203.70, 166,805.55 and 81,752.10 is: 122,628.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,203.70 : 166,805.55 = 81,752.10 : x
  2. Step 2: Convert to fraction form
    111,203.70/166,805.55 = 81,752.10/x
  3. Step 3: Cross multiply
    111,203.70x = 166,805.55 × 81,752.10
  4. Step 4: Simplify right side
    111,203.70x = 13,636,704,004.16
  5. Step 5: Solve for x
    x = 13,636,704,004.16/111,203.70
  6. Step 6: Final answer
    x = 122,628.15

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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.