Home / 221,112.84-305,136.60-120,510.84

Finding the Fourth Proportional to 221,112.84, 305,136.60 and 120,510.84

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Solution

The fourth proportional to 221,112.84, 305,136.60 and 120,510.84 is: 166,305.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,112.84 : 305,136.60 = 120,510.84 : x
  2. Step 2: Convert to fraction form
    221,112.84/305,136.60 = 120,510.84/x
  3. Step 3: Cross multiply
    221,112.84x = 305,136.60 × 120,510.84
  4. Step 4: Simplify right side
    221,112.84x = 36,772,267,980.74
  5. Step 5: Solve for x
    x = 36,772,267,980.74/221,112.84
  6. Step 6: Final answer
    x = 166,305.44

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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.