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Finding the Fourth Proportional to 421,586.10, 632,480.49 and 122,087.39

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Solution

The fourth proportional to 421,586.10, 632,480.49 and 122,087.39 is: 183,160.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,586.10 : 632,480.49 = 122,087.39 : x
  2. Step 2: Convert to fraction form
    421,586.10/632,480.49 = 122,087.39/x
  3. Step 3: Cross multiply
    421,586.10x = 632,480.49 × 122,087.39
  4. Step 4: Simplify right side
    421,586.10x = 77,217,889,087.62
  5. Step 5: Solve for x
    x = 77,217,889,087.62/421,586.10
  6. Step 6: Final answer
    x = 183,160.42

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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.