Home / 305,139.03-421,135.46-169,203.21

Finding the Fourth Proportional to 305,139.03, 421,135.46 and 169,203.21

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Solution

The fourth proportional to 305,139.03, 421,135.46 and 169,203.21 is: 233,524.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,139.03 : 421,135.46 = 169,203.21 : x
  2. Step 2: Convert to fraction form
    305,139.03/421,135.46 = 169,203.21/x
  3. Step 3: Cross multiply
    305,139.03x = 421,135.46 × 169,203.21
  4. Step 4: Simplify right side
    305,139.03x = 71,257,470,830.81
  5. Step 5: Solve for x
    x = 71,257,470,830.81/305,139.03
  6. Step 6: Final answer
    x = 233,524.60

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1.5x scale

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.