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Finding the Fourth Proportional to 212,687.56, 293,506.45 and 120,806.20

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Solution

The fourth proportional to 212,687.56, 293,506.45 and 120,806.20 is: 166,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,687.56 : 293,506.45 = 120,806.20 : x
  2. Step 2: Convert to fraction form
    212,687.56/293,506.45 = 120,806.20/x
  3. Step 3: Cross multiply
    212,687.56x = 293,506.45 × 120,806.20
  4. Step 4: Simplify right side
    212,687.56x = 35,457,398,899.99
  5. Step 5: Solve for x
    x = 35,457,398,899.99/212,687.56
  6. Step 6: Final answer
    x = 166,711.20

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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.