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Finding the Fourth Proportional to 100,907.88, 139,252.90 and 58,491.01

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Solution

The fourth proportional to 100,907.88, 139,252.90 and 58,491.01 is: 80,717.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,907.88 : 139,252.90 = 58,491.01 : x
  2. Step 2: Convert to fraction form
    100,907.88/139,252.90 = 58,491.01/x
  3. Step 3: Cross multiply
    100,907.88x = 139,252.90 × 58,491.01
  4. Step 4: Simplify right side
    100,907.88x = 8,145,042,766.43
  5. Step 5: Solve for x
    x = 8,145,042,766.43/100,907.88
  6. Step 6: Final answer
    x = 80,717.61

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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.