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Finding the Fourth Proportional to 111,307.80, 166,961.70 and 28,201.80

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Solution

The fourth proportional to 111,307.80, 166,961.70 and 28,201.80 is: 42,302.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,307.80 : 166,961.70 = 28,201.80 : x
  2. Step 2: Convert to fraction form
    111,307.80/166,961.70 = 28,201.80/x
  3. Step 3: Cross multiply
    111,307.80x = 166,961.70 × 28,201.80
  4. Step 4: Simplify right side
    111,307.80x = 4,708,620,471.06
  5. Step 5: Solve for x
    x = 4,708,620,471.06/111,307.80
  6. Step 6: Final answer
    x = 42,302.70

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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.