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Finding the Fourth Proportional to 118,975.61, 178,112.79 and 104,213.36

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Solution

The fourth proportional to 118,975.61, 178,112.79 and 104,213.36 is: 156,012.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,975.61 : 178,112.79 = 104,213.36 : x
  2. Step 2: Convert to fraction form
    118,975.61/178,112.79 = 104,213.36/x
  3. Step 3: Cross multiply
    118,975.61x = 178,112.79 × 104,213.36
  4. Step 4: Simplify right side
    118,975.61x = 18,561,732,750.16
  5. Step 5: Solve for x
    x = 18,561,732,750.16/118,975.61
  6. Step 6: Final answer
    x = 156,012.92

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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.