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Finding the Fourth Proportional to 118,659.81, 178,112.73 and 79,490.64

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Solution

The fourth proportional to 118,659.81, 178,112.73 and 79,490.64 is: 119,318.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,659.81 : 178,112.73 = 79,490.64 : x
  2. Step 2: Convert to fraction form
    118,659.81/178,112.73 = 79,490.64/x
  3. Step 3: Cross multiply
    118,659.81x = 178,112.73 × 79,490.64
  4. Step 4: Simplify right side
    118,659.81x = 14,158,294,899.85
  5. Step 5: Solve for x
    x = 14,158,294,899.85/118,659.81
  6. Step 6: Final answer
    x = 119,318.37

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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.