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Finding the Fourth Proportional to 76,609.50, 114,914.30 and 20,449.84

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Solution

The fourth proportional to 76,609.50, 114,914.30 and 20,449.84 is: 30,674.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,609.50 : 114,914.30 = 20,449.84 : x
  2. Step 2: Convert to fraction form
    76,609.50/114,914.30 = 20,449.84/x
  3. Step 3: Cross multiply
    76,609.50x = 114,914.30 × 20,449.84
  4. Step 4: Simplify right side
    76,609.50x = 2,349,979,048.71
  5. Step 5: Solve for x
    x = 2,349,979,048.71/76,609.50
  6. Step 6: Final answer
    x = 30,674.77

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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.