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Finding the Fourth Proportional to 103,651.95, 154,408.21 and 100,515.74

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Solution

The fourth proportional to 103,651.95, 154,408.21 and 100,515.74 is: 149,736.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,651.95 : 154,408.21 = 100,515.74 : x
  2. Step 2: Convert to fraction form
    103,651.95/154,408.21 = 100,515.74/x
  3. Step 3: Cross multiply
    103,651.95x = 154,408.21 × 100,515.74
  4. Step 4: Simplify right side
    103,651.95x = 15,520,454,466.90
  5. Step 5: Solve for x
    x = 15,520,454,466.90/103,651.95
  6. Step 6: Final answer
    x = 149,736.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.