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Finding the Fourth Proportional to 111,318.40, 166,588.80 and 77,881.60

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Solution

The fourth proportional to 111,318.40, 166,588.80 and 77,881.60 is: 116,550.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,318.40 : 166,588.80 = 77,881.60 : x
  2. Step 2: Convert to fraction form
    111,318.40/166,588.80 = 77,881.60/x
  3. Step 3: Cross multiply
    111,318.40x = 166,588.80 × 77,881.60
  4. Step 4: Simplify right side
    111,318.40x = 12,974,202,286.08
  5. Step 5: Solve for x
    x = 12,974,202,286.08/111,318.40
  6. Step 6: Final answer
    x = 116,550.38

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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.