Home / 207,282.20-311,153.70-128,485.40

Finding the Fourth Proportional to 207,282.20, 311,153.70 and 128,485.40

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Solution

The fourth proportional to 207,282.20, 311,153.70 and 128,485.40 is: 192,870.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,282.20 : 311,153.70 = 128,485.40 : x
  2. Step 2: Convert to fraction form
    207,282.20/311,153.70 = 128,485.40/x
  3. Step 3: Cross multiply
    207,282.20x = 311,153.70 × 128,485.40
  4. Step 4: Simplify right side
    207,282.20x = 39,978,707,605.98
  5. Step 5: Solve for x
    x = 39,978,707,605.98/207,282.20
  6. Step 6: Final answer
    x = 192,870.92

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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.