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Finding the Fourth Proportional to 76,612.12, 114,917.78 and 19,685.98

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Solution

The fourth proportional to 76,612.12, 114,917.78 and 19,685.98 is: 29,528.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,612.12 : 114,917.78 = 19,685.98 : x
  2. Step 2: Convert to fraction form
    76,612.12/114,917.78 = 19,685.98/x
  3. Step 3: Cross multiply
    76,612.12x = 114,917.78 × 19,685.98
  4. Step 4: Simplify right side
    76,612.12x = 2,262,269,118.72
  5. Step 5: Solve for x
    x = 2,262,269,118.72/76,612.12
  6. Step 6: Final answer
    x = 29,528.87

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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.