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Finding the Fourth Proportional to 207,907.40, 311,868.30 and 65,754.20

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Solution

The fourth proportional to 207,907.40, 311,868.30 and 65,754.20 is: 98,633.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,907.40 : 311,868.30 = 65,754.20 : x
  2. Step 2: Convert to fraction form
    207,907.40/311,868.30 = 65,754.20/x
  3. Step 3: Cross multiply
    207,907.40x = 311,868.30 × 65,754.20
  4. Step 4: Simplify right side
    207,907.40x = 20,506,650,571.86
  5. Step 5: Solve for x
    x = 20,506,650,571.86/207,907.40
  6. Step 6: Final answer
    x = 98,633.58

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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.