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Finding the Fourth Proportional to 76,705.60, 115,069.76 and 39,286.84

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Solution

The fourth proportional to 76,705.60, 115,069.76 and 39,286.84 is: 58,936.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,705.60 : 115,069.76 = 39,286.84 : x
  2. Step 2: Convert to fraction form
    76,705.60/115,069.76 = 39,286.84/x
  3. Step 3: Cross multiply
    76,705.60x = 115,069.76 × 39,286.84
  4. Step 4: Simplify right side
    76,705.60x = 4,520,727,249.96
  5. Step 5: Solve for x
    x = 4,520,727,249.96/76,705.60
  6. Step 6: Final answer
    x = 58,936.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.