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Finding the Fourth Proportional to 285,012.80, 427,672.80 and 118,817.60

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Solution

The fourth proportional to 285,012.80, 427,672.80 and 118,817.60 is: 178,290.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,012.80 : 427,672.80 = 118,817.60 : x
  2. Step 2: Convert to fraction form
    285,012.80/427,672.80 = 118,817.60/x
  3. Step 3: Cross multiply
    285,012.80x = 427,672.80 × 118,817.60
  4. Step 4: Simplify right side
    285,012.80x = 50,815,055,681.28
  5. Step 5: Solve for x
    x = 50,815,055,681.28/285,012.80
  6. Step 6: Final answer
    x = 178,290.43

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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.