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Finding the Fourth Proportional to 223,846.12, 308,907.30 and 128,378.44

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Solution

The fourth proportional to 223,846.12, 308,907.30 and 128,378.44 is: 177,162.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,846.12 : 308,907.30 = 128,378.44 : x
  2. Step 2: Convert to fraction form
    223,846.12/308,907.30 = 128,378.44/x
  3. Step 3: Cross multiply
    223,846.12x = 308,907.30 × 128,378.44
  4. Step 4: Simplify right side
    223,846.12x = 39,657,037,278.61
  5. Step 5: Solve for x
    x = 39,657,037,278.61/223,846.12
  6. Step 6: Final answer
    x = 177,162.05

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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.