Home / 305,129.57-421,103.75-169,206.14

Finding the Fourth Proportional to 305,129.57, 421,103.75 and 169,206.14

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Solution

The fourth proportional to 305,129.57, 421,103.75 and 169,206.14 is: 233,518.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,129.57 : 421,103.75 = 169,206.14 : x
  2. Step 2: Convert to fraction form
    305,129.57/421,103.75 = 169,206.14/x
  3. Step 3: Cross multiply
    305,129.57x = 421,103.75 × 169,206.14
  4. Step 4: Simplify right side
    305,129.57x = 71,253,340,283.75
  5. Step 5: Solve for x
    x = 71,253,340,283.75/305,129.57
  6. Step 6: Final answer
    x = 233,518.31

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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.