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Finding the Fourth Proportional to 111,290.10, 166,935.15 and 81,765.60

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Solution

The fourth proportional to 111,290.10, 166,935.15 and 81,765.60 is: 122,648.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,290.10 : 166,935.15 = 81,765.60 : x
  2. Step 2: Convert to fraction form
    111,290.10/166,935.15 = 81,765.60/x
  3. Step 3: Cross multiply
    111,290.10x = 166,935.15 × 81,765.60
  4. Step 4: Simplify right side
    111,290.10x = 13,649,552,700.84
  5. Step 5: Solve for x
    x = 13,649,552,700.84/111,290.10
  6. Step 6: Final answer
    x = 122,648.40

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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.