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Finding the Fourth Proportional to 207,309.12, 311,009.04 and 67,065.72

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Solution

The fourth proportional to 207,309.12, 311,009.04 and 67,065.72 is: 100,613.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,309.12 : 311,009.04 = 67,065.72 : x
  2. Step 2: Convert to fraction form
    207,309.12/311,009.04 = 67,065.72/x
  3. Step 3: Cross multiply
    207,309.12x = 311,009.04 × 67,065.72
  4. Step 4: Simplify right side
    207,309.12x = 20,858,045,194.11
  5. Step 5: Solve for x
    x = 20,858,045,194.11/207,309.12
  6. Step 6: Final answer
    x = 100,613.25

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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.