Home / 211,912.80-292,270.53-139,390.17

Finding the Fourth Proportional to 211,912.80, 292,270.53 and 139,390.17

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Solution

The fourth proportional to 211,912.80, 292,270.53 and 139,390.17 is: 192,247.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,912.80 : 292,270.53 = 139,390.17 : x
  2. Step 2: Convert to fraction form
    211,912.80/292,270.53 = 139,390.17/x
  3. Step 3: Cross multiply
    211,912.80x = 292,270.53 × 139,390.17
  4. Step 4: Simplify right side
    211,912.80x = 40,739,638,862.69
  5. Step 5: Solve for x
    x = 40,739,638,862.69/211,912.80
  6. Step 6: Final answer
    x = 192,247.18

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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.