Home / 221,100.98-305,120.40-125,612.92

Finding the Fourth Proportional to 221,100.98, 305,120.40 and 125,612.92

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Solution

The fourth proportional to 221,100.98, 305,120.40 and 125,612.92 is: 173,346.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,100.98 : 305,120.40 = 125,612.92 : x
  2. Step 2: Convert to fraction form
    221,100.98/305,120.40 = 125,612.92/x
  3. Step 3: Cross multiply
    221,100.98x = 305,120.40 × 125,612.92
  4. Step 4: Simplify right side
    221,100.98x = 38,327,064,395.57
  5. Step 5: Solve for x
    x = 38,327,064,395.57/221,100.98
  6. Step 6: Final answer
    x = 173,346.42

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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.