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Finding the Fourth Proportional to 266,087.23, 399,247.71 and 139,698.11

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Solution

The fourth proportional to 266,087.23, 399,247.71 and 139,698.11 is: 209,608.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,087.23 : 399,247.71 = 139,698.11 : x
  2. Step 2: Convert to fraction form
    266,087.23/399,247.71 = 139,698.11/x
  3. Step 3: Cross multiply
    266,087.23x = 399,247.71 × 139,698.11
  4. Step 4: Simplify right side
    266,087.23x = 55,774,150,508.83
  5. Step 5: Solve for x
    x = 55,774,150,508.83/266,087.23
  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.