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Finding the Fourth Proportional to 86,624.07, 129,936.10 and 20,960.07

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Solution

The fourth proportional to 86,624.07, 129,936.10 and 20,960.07 is: 31,440.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,624.07 : 129,936.10 = 20,960.07 : x
  2. Step 2: Convert to fraction form
    86,624.07/129,936.10 = 20,960.07/x
  3. Step 3: Cross multiply
    86,624.07x = 129,936.10 × 20,960.07
  4. Step 4: Simplify right side
    86,624.07x = 2,723,469,751.53
  5. Step 5: Solve for x
    x = 2,723,469,751.53/86,624.07
  6. Step 6: Final answer
    x = 31,440.10

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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.