Home / 120,418.72-180,568.54-70,511.38

Finding the Fourth Proportional to 120,418.72, 180,568.54 and 70,511.38

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Solution

The fourth proportional to 120,418.72, 180,568.54 and 70,511.38 is: 105,732.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,418.72 : 180,568.54 = 70,511.38 : x
  2. Step 2: Convert to fraction form
    120,418.72/180,568.54 = 70,511.38/x
  3. Step 3: Cross multiply
    120,418.72x = 180,568.54 × 70,511.38
  4. Step 4: Simplify right side
    120,418.72x = 12,732,136,939.99
  5. Step 5: Solve for x
    x = 12,732,136,939.99/120,418.72
  6. Step 6: Final answer
    x = 105,732.21

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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.