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Finding the Fourth Proportional to 217,697.40, 300,425.36 and 120,907.51

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Solution

The fourth proportional to 217,697.40, 300,425.36 and 120,907.51 is: 166,853.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,697.40 : 300,425.36 = 120,907.51 : x
  2. Step 2: Convert to fraction form
    217,697.40/300,425.36 = 120,907.51/x
  3. Step 3: Cross multiply
    217,697.40x = 300,425.36 × 120,907.51
  4. Step 4: Simplify right side
    217,697.40x = 36,323,680,862.85
  5. Step 5: Solve for x
    x = 36,323,680,862.85/217,697.40
  6. Step 6: Final answer
    x = 166,853.99

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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.