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Finding the Fourth Proportional to 120,915.99, 181,401.22 and 40,949.45

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Solution

The fourth proportional to 120,915.99, 181,401.22 and 40,949.45 is: 61,433.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,915.99 : 181,401.22 = 40,949.45 : x
  2. Step 2: Convert to fraction form
    120,915.99/181,401.22 = 40,949.45/x
  3. Step 3: Cross multiply
    120,915.99x = 181,401.22 × 40,949.45
  4. Step 4: Simplify right side
    120,915.99x = 7,428,280,012.76
  5. Step 5: Solve for x
    x = 7,428,280,012.76/120,915.99
  6. Step 6: Final answer
    x = 61,433.40

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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.