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Finding the Fourth Proportional to 111,206.40, 166,809.60 and 66,810.30

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Solution

The fourth proportional to 111,206.40, 166,809.60 and 66,810.30 is: 100,215.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,206.40 : 166,809.60 = 66,810.30 : x
  2. Step 2: Convert to fraction form
    111,206.40/166,809.60 = 66,810.30/x
  3. Step 3: Cross multiply
    111,206.40x = 166,809.60 × 66,810.30
  4. Step 4: Simplify right side
    111,206.40x = 11,144,599,418.88
  5. Step 5: Solve for x
    x = 11,144,599,418.88/111,206.40
  6. Step 6: Final answer
    x = 100,215.45

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1.5x scale

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.