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Finding the Fourth Proportional to 76,636.56, 105,698.44 and 49,787.66

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Solution

The fourth proportional to 76,636.56, 105,698.44 and 49,787.66 is: 68,667.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,636.56 : 105,698.44 = 49,787.66 : x
  2. Step 2: Convert to fraction form
    76,636.56/105,698.44 = 49,787.66/x
  3. Step 3: Cross multiply
    76,636.56x = 105,698.44 × 49,787.66
  4. Step 4: Simplify right side
    76,636.56x = 5,262,477,993.25
  5. Step 5: Solve for x
    x = 5,262,477,993.25/76,636.56
  6. Step 6: Final answer
    x = 68,667.98

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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.