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Finding the Fourth Proportional to 111,129.40, 166,657.65 and 40,999.60

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Solution

The fourth proportional to 111,129.40, 166,657.65 and 40,999.60 is: 61,485.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,129.40 : 166,657.65 = 40,999.60 : x
  2. Step 2: Convert to fraction form
    111,129.40/166,657.65 = 40,999.60/x
  3. Step 3: Cross multiply
    111,129.40x = 166,657.65 × 40,999.60
  4. Step 4: Simplify right side
    111,129.40x = 6,832,896,986.94
  5. Step 5: Solve for x
    x = 6,832,896,986.94/111,129.40
  6. Step 6: Final answer
    x = 61,485.95

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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.