Home / 305,105.50-421,006.63-169,138.19

Finding the Fourth Proportional to 305,105.50, 421,006.63 and 169,138.19

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Solution

The fourth proportional to 305,105.50, 421,006.63 and 169,138.19 is: 233,389.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,105.50 : 421,006.63 = 169,138.19 : x
  2. Step 2: Convert to fraction form
    305,105.50/421,006.63 = 169,138.19/x
  3. Step 3: Cross multiply
    305,105.50x = 421,006.63 × 169,138.19
  4. Step 4: Simplify right side
    305,105.50x = 71,208,299,376.20
  5. Step 5: Solve for x
    x = 71,208,299,376.20/305,105.50
  6. Step 6: Final answer
    x = 233,389.10

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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.