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Finding the Fourth Proportional to 221,124.80, 331,322.40 and 127,467.20

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Solution

The fourth proportional to 221,124.80, 331,322.40 and 127,467.20 is: 190,990.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,124.80 : 331,322.40 = 127,467.20 : x
  2. Step 2: Convert to fraction form
    221,124.80/331,322.40 = 127,467.20/x
  3. Step 3: Cross multiply
    221,124.80x = 331,322.40 × 127,467.20
  4. Step 4: Simplify right side
    221,124.80x = 42,232,738,625.28
  5. Step 5: Solve for x
    x = 42,232,738,625.28/221,124.80
  6. Step 6: Final answer
    x = 190,990.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.