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Finding the Fourth Proportional to 120,847.80, 180,913.30 and 89,820.60

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Solution

The fourth proportional to 120,847.80, 180,913.30 and 89,820.60 is: 134,464.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,847.80 : 180,913.30 = 89,820.60 : x
  2. Step 2: Convert to fraction form
    120,847.80/180,913.30 = 89,820.60/x
  3. Step 3: Cross multiply
    120,847.80x = 180,913.30 × 89,820.60
  4. Step 4: Simplify right side
    120,847.80x = 16,249,741,153.98
  5. Step 5: Solve for x
    x = 16,249,741,153.98/120,847.80
  6. Step 6: Final answer
    x = 134,464.52

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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.