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Finding the Fourth Proportional to 120,487.80, 180,699.30 and 50,352.60

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Solution

The fourth proportional to 120,487.80, 180,699.30 and 50,352.60 is: 75,515.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,487.80 : 180,699.30 = 50,352.60 : x
  2. Step 2: Convert to fraction form
    120,487.80/180,699.30 = 50,352.60/x
  3. Step 3: Cross multiply
    120,487.80x = 180,699.30 × 50,352.60
  4. Step 4: Simplify right side
    120,487.80x = 9,098,679,573.18
  5. Step 5: Solve for x
    x = 9,098,679,573.18/120,487.80
  6. Step 6: Final answer
    x = 75,515.36

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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.