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Finding the Fourth Proportional to 121,978.20, 183,404.70 and 102,732.60

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Solution

The fourth proportional to 121,978.20, 183,404.70 and 102,732.60 is: 154,467.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,978.20 : 183,404.70 = 102,732.60 : x
  2. Step 2: Convert to fraction form
    121,978.20/183,404.70 = 102,732.60/x
  3. Step 3: Cross multiply
    121,978.20x = 183,404.70 × 102,732.60
  4. Step 4: Simplify right side
    121,978.20x = 18,841,641,683.22
  5. Step 5: Solve for x
    x = 18,841,641,683.22/121,978.20
  6. Step 6: Final answer
    x = 154,467.29

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.