Home / 213,640.51-320,008.67-138,537.57

Finding the Fourth Proportional to 213,640.51, 320,008.67 and 138,537.57

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Solution

The fourth proportional to 213,640.51, 320,008.67 and 138,537.57 is: 207,513.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,640.51 : 320,008.67 = 138,537.57 : x
  2. Step 2: Convert to fraction form
    213,640.51/320,008.67 = 138,537.57/x
  3. Step 3: Cross multiply
    213,640.51x = 320,008.67 × 138,537.57
  4. Step 4: Simplify right side
    213,640.51x = 44,333,222,626.79
  5. Step 5: Solve for x
    x = 44,333,222,626.79/213,640.51
  6. Step 6: Final answer
    x = 207,513.18

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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.