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Finding the Fourth Proportional to 206,549.74, 309,429.63 and 139,661.56

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Solution

The fourth proportional to 206,549.74, 309,429.63 and 139,661.56 is: 209,225.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,549.74 : 309,429.63 = 139,661.56 : x
  2. Step 2: Convert to fraction form
    206,549.74/309,429.63 = 139,661.56/x
  3. Step 3: Cross multiply
    206,549.74x = 309,429.63 × 139,661.56
  4. Step 4: Simplify right side
    206,549.74x = 43,215,424,836.02
  5. Step 5: Solve for x
    x = 43,215,424,836.02/206,549.74
  6. Step 6: Final answer
    x = 209,225.27

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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.