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Finding the Fourth Proportional to 212,288.88, 318,170.88 and 107,137.92

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Solution

The fourth proportional to 212,288.88, 318,170.88 and 107,137.92 is: 160,574.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,288.88 : 318,170.88 = 107,137.92 : x
  2. Step 2: Convert to fraction form
    212,288.88/318,170.88 = 107,137.92/x
  3. Step 3: Cross multiply
    212,288.88x = 318,170.88 × 107,137.92
  4. Step 4: Simplify right side
    212,288.88x = 34,088,166,287.77
  5. Step 5: Solve for x
    x = 34,088,166,287.77/212,288.88
  6. Step 6: Final answer
    x = 160,574.43

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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.