Home / 77,680.12-116,522.75-21,520.79

Finding the Fourth Proportional to 77,680.12, 116,522.75 and 21,520.79

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Solution

The fourth proportional to 77,680.12, 116,522.75 and 21,520.79 is: 32,281.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,680.12 : 116,522.75 = 21,520.79 : x
  2. Step 2: Convert to fraction form
    77,680.12/116,522.75 = 21,520.79/x
  3. Step 3: Cross multiply
    77,680.12x = 116,522.75 × 21,520.79
  4. Step 4: Simplify right side
    77,680.12x = 2,507,661,632.97
  5. Step 5: Solve for x
    x = 2,507,661,632.97/77,680.12
  6. Step 6: Final answer
    x = 32,281.90

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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.