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Finding the Fourth Proportional to 118,665.56, 178,068.36 and 43,838.66

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Solution

The fourth proportional to 118,665.56, 178,068.36 and 43,838.66 is: 65,783.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,665.56 : 178,068.36 = 43,838.66 : x
  2. Step 2: Convert to fraction form
    118,665.56/178,068.36 = 43,838.66/x
  3. Step 3: Cross multiply
    118,665.56x = 178,068.36 × 43,838.66
  4. Step 4: Simplify right side
    118,665.56x = 7,806,278,290.80
  5. Step 5: Solve for x
    x = 7,806,278,290.80/118,665.56
  6. Step 6: Final answer
    x = 65,783.86

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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.