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Finding the Fourth Proportional to 76,624.19, 114,936.29 and 21,220.19

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Solution

The fourth proportional to 76,624.19, 114,936.29 and 21,220.19 is: 31,830.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,624.19 : 114,936.29 = 21,220.19 : x
  2. Step 2: Convert to fraction form
    76,624.19/114,936.29 = 21,220.19/x
  3. Step 3: Cross multiply
    76,624.19x = 114,936.29 × 21,220.19
  4. Step 4: Simplify right side
    76,624.19x = 2,438,969,911.70
  5. Step 5: Solve for x
    x = 2,438,969,911.70/76,624.19
  6. Step 6: Final answer
    x = 31,830.29

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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.