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Finding the Fourth Proportional to 223,959.21, 309,063.69 and 123,357.21

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Solution

The fourth proportional to 223,959.21, 309,063.69 and 123,357.21 is: 170,232.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,959.21 : 309,063.69 = 123,357.21 : x
  2. Step 2: Convert to fraction form
    223,959.21/309,063.69 = 123,357.21/x
  3. Step 3: Cross multiply
    223,959.21x = 309,063.69 × 123,357.21
  4. Step 4: Simplify right side
    223,959.21x = 38,125,234,510.70
  5. Step 5: Solve for x
    x = 38,125,234,510.70/223,959.21
  6. Step 6: Final answer
    x = 170,232.94

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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.