Home / 305,186.31-421,140.13-169,212.29

Finding the Fourth Proportional to 305,186.31, 421,140.13 and 169,212.29

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Solution

The fourth proportional to 305,186.31, 421,140.13 and 169,212.29 is: 233,503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,186.31 : 421,140.13 = 169,212.29 : x
  2. Step 2: Convert to fraction form
    305,186.31/421,140.13 = 169,212.29/x
  3. Step 3: Cross multiply
    305,186.31x = 421,140.13 × 169,212.29
  4. Step 4: Simplify right side
    305,186.31x = 71,262,083,279.47
  5. Step 5: Solve for x
    x = 71,262,083,279.47/305,186.31
  6. Step 6: Final answer
    x = 233,503.54

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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.