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Finding the Fourth Proportional to 100,940.88, 139,310.64 and 58,501.20

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Solution

The fourth proportional to 100,940.88, 139,310.64 and 58,501.20 is: 80,738.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,940.88 : 139,310.64 = 58,501.20 : x
  2. Step 2: Convert to fraction form
    100,940.88/139,310.64 = 58,501.20/x
  3. Step 3: Cross multiply
    100,940.88x = 139,310.64 × 58,501.20
  4. Step 4: Simplify right side
    100,940.88x = 8,149,839,612.77
  5. Step 5: Solve for x
    x = 8,149,839,612.77/100,940.88
  6. Step 6: Final answer
    x = 80,738.74

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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.