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Finding the Fourth Proportional to 45,223, 67,836.42 and 12,391

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Solution

The fourth proportional to 45,223, 67,836.42 and 12,391 is: 18,587.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,223 : 67,836.42 = 12,391 : x
  2. Step 2: Convert to fraction form
    45,223/67,836.42 = 12,391/x
  3. Step 3: Cross multiply
    45,223x = 67,836.42 × 12,391
  4. Step 4: Simplify right side
    45,223x = 840,561,080.22
  5. Step 5: Solve for x
    x = 840,561,080.22/45,223
  6. Step 6: Final answer
    x = 18,587.03

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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.