Home / 206,541.23-309,416.90-139,653.05

Finding the Fourth Proportional to 206,541.23, 309,416.90 and 139,653.05

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Solution

The fourth proportional to 206,541.23, 309,416.90 and 139,653.05 is: 209,212.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,541.23 : 309,416.90 = 139,653.05 : x
  2. Step 2: Convert to fraction form
    206,541.23/309,416.90 = 139,653.05/x
  3. Step 3: Cross multiply
    206,541.23x = 309,416.90 × 139,653.05
  4. Step 4: Simplify right side
    206,541.23x = 43,211,011,561.20
  5. Step 5: Solve for x
    x = 43,211,011,561.20/206,541.23
  6. Step 6: Final answer
    x = 209,212.53

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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.