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Finding the Fourth Proportional to 266,087.22, 399,247.72 and 139,698.10

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Solution

The fourth proportional to 266,087.22, 399,247.72 and 139,698.10 is: 209,608.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,087.22 : 399,247.72 = 139,698.10 : x
  2. Step 2: Convert to fraction form
    266,087.22/399,247.72 = 139,698.10/x
  3. Step 3: Cross multiply
    266,087.22x = 399,247.72 × 139,698.10
  4. Step 4: Simplify right side
    266,087.22x = 55,774,147,913.33
  5. Step 5: Solve for x
    x = 55,774,147,913.33/266,087.22
  6. Step 6: Final answer
    x = 209,608.52

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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.