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Finding the Fourth Proportional to 128,865.80, 193,068.30 and 110,433.80

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Solution

The fourth proportional to 128,865.80, 193,068.30 and 110,433.80 is: 165,453.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,865.80 : 193,068.30 = 110,433.80 : x
  2. Step 2: Convert to fraction form
    128,865.80/193,068.30 = 110,433.80/x
  3. Step 3: Cross multiply
    128,865.80x = 193,068.30 × 110,433.80
  4. Step 4: Simplify right side
    128,865.80x = 21,321,266,028.54
  5. Step 5: Solve for x
    x = 21,321,266,028.54/128,865.80
  6. Step 6: Final answer
    x = 165,453.25

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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.