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Finding the Fourth Proportional to 120,658.57, 180,916.88 and 45,783.97

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Solution

The fourth proportional to 120,658.57, 180,916.88 and 45,783.97 is: 68,649.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,658.57 : 180,916.88 = 45,783.97 : x
  2. Step 2: Convert to fraction form
    120,658.57/180,916.88 = 45,783.97/x
  3. Step 3: Cross multiply
    120,658.57x = 180,916.88 × 45,783.97
  4. Step 4: Simplify right side
    120,658.57x = 8,283,093,998.89
  5. Step 5: Solve for x
    x = 8,283,093,998.89/120,658.57
  6. Step 6: Final answer
    x = 68,649.03

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1.5x scale

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.