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Finding the Fourth Proportional to 111,034.40, 166,551.60 and 72,980.60

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Solution

The fourth proportional to 111,034.40, 166,551.60 and 72,980.60 is: 109,470.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,034.40 : 166,551.60 = 72,980.60 : x
  2. Step 2: Convert to fraction form
    111,034.40/166,551.60 = 72,980.60/x
  3. Step 3: Cross multiply
    111,034.40x = 166,551.60 × 72,980.60
  4. Step 4: Simplify right side
    111,034.40x = 12,155,035,698.96
  5. Step 5: Solve for x
    x = 12,155,035,698.96/111,034.40
  6. Step 6: Final answer
    x = 109,470.90

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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.