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Finding the Fourth Proportional to 100,940.34, 139,266.82 and 58,490.68

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Solution

The fourth proportional to 100,940.34, 139,266.82 and 58,490.68 is: 80,699.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,940.34 : 139,266.82 = 58,490.68 : x
  2. Step 2: Convert to fraction form
    100,940.34/139,266.82 = 58,490.68/x
  3. Step 3: Cross multiply
    100,940.34x = 139,266.82 × 58,490.68
  4. Step 4: Simplify right side
    100,940.34x = 8,145,811,003.24
  5. Step 5: Solve for x
    x = 8,145,811,003.24/100,940.34
  6. Step 6: Final answer
    x = 80,699.26

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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.