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Finding the Fourth Proportional to 211,914, 292,480.20 and 122,490

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Solution

The fourth proportional to 211,914, 292,480.20 and 122,490 is: 169,058.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,914 : 292,480.20 = 122,490 : x
  2. Step 2: Convert to fraction form
    211,914/292,480.20 = 122,490/x
  3. Step 3: Cross multiply
    211,914x = 292,480.20 × 122,490
  4. Step 4: Simplify right side
    211,914x = 35,825,899,698
  5. Step 5: Solve for x
    x = 35,825,899,698/211,914
  6. Step 6: Final answer
    x = 169,058.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.