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Finding the Fourth Proportional to 111,175.80, 166,763.70 and 66,779.70

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Solution

The fourth proportional to 111,175.80, 166,763.70 and 66,779.70 is: 100,169.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,175.80 : 166,763.70 = 66,779.70 : x
  2. Step 2: Convert to fraction form
    111,175.80/166,763.70 = 66,779.70/x
  3. Step 3: Cross multiply
    111,175.80x = 166,763.70 × 66,779.70
  4. Step 4: Simplify right side
    111,175.80x = 11,136,429,856.89
  5. Step 5: Solve for x
    x = 11,136,429,856.89/111,175.80
  6. Step 6: Final answer
    x = 100,169.55

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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.