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Finding the Fourth Proportional to 143,286.84, 197,737.64 and 78,763.12

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Solution

The fourth proportional to 143,286.84, 197,737.64 and 78,763.12 is: 108,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,286.84 : 197,737.64 = 78,763.12 : x
  2. Step 2: Convert to fraction form
    143,286.84/197,737.64 = 78,763.12/x
  3. Step 3: Cross multiply
    143,286.84x = 197,737.64 × 78,763.12
  4. Step 4: Simplify right side
    143,286.84x = 15,574,433,467.84
  5. Step 5: Solve for x
    x = 15,574,433,467.84/143,286.84
  6. Step 6: Final answer
    x = 108,694.10

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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.