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Finding the Fourth Proportional to 202,891.20, 304,586.40 and 128,011.20

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Solution

The fourth proportional to 202,891.20, 304,586.40 and 128,011.20 is: 192,174.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,891.20 : 304,586.40 = 128,011.20 : x
  2. Step 2: Convert to fraction form
    202,891.20/304,586.40 = 128,011.20/x
  3. Step 3: Cross multiply
    202,891.20x = 304,586.40 × 128,011.20
  4. Step 4: Simplify right side
    202,891.20x = 38,990,470,567.68
  5. Step 5: Solve for x
    x = 38,990,470,567.68/202,891.20
  6. Step 6: Final answer
    x = 192,174.28

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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.