Home / 143,408.17-197,908.11-78,880.12

Finding the Fourth Proportional to 143,408.17, 197,908.11 and 78,880.12

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Solution

The fourth proportional to 143,408.17, 197,908.11 and 78,880.12 is: 108,857.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,408.17 : 197,908.11 = 78,880.12 : x
  2. Step 2: Convert to fraction form
    143,408.17/197,908.11 = 78,880.12/x
  3. Step 3: Cross multiply
    143,408.17x = 197,908.11 × 78,880.12
  4. Step 4: Simplify right side
    143,408.17x = 15,611,015,465.77
  5. Step 5: Solve for x
    x = 15,611,015,465.77/143,408.17
  6. Step 6: Final answer
    x = 108,857.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.