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Finding the Fourth Proportional to 218,846.70, 328,146.91 and 69,059.07

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Solution

The fourth proportional to 218,846.70, 328,146.91 and 69,059.07 is: 103,549.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,846.70 : 328,146.91 = 69,059.07 : x
  2. Step 2: Convert to fraction form
    218,846.70/328,146.91 = 69,059.07/x
  3. Step 3: Cross multiply
    218,846.70x = 328,146.91 × 69,059.07
  4. Step 4: Simplify right side
    218,846.70x = 22,661,520,427.97
  5. Step 5: Solve for x
    x = 22,661,520,427.97/218,846.70
  6. Step 6: Final answer
    x = 103,549.75

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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.