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Finding the Fourth Proportional to 49,647.80, 68,529.90 and 31,790.90

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Solution

The fourth proportional to 49,647.80, 68,529.90 and 31,790.90 is: 43,881.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,647.80 : 68,529.90 = 31,790.90 : x
  2. Step 2: Convert to fraction form
    49,647.80/68,529.90 = 31,790.90/x
  3. Step 3: Cross multiply
    49,647.80x = 68,529.90 × 31,790.90
  4. Step 4: Simplify right side
    49,647.80x = 2,178,627,197.91
  5. Step 5: Solve for x
    x = 2,178,627,197.91/49,647.80
  6. Step 6: Final answer
    x = 43,881.65

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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.