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Finding the Fourth Proportional to 93,989.59, 140,647.56 and 81,382.85

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Solution

The fourth proportional to 93,989.59, 140,647.56 and 81,382.85 is: 121,782.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,989.59 : 140,647.56 = 81,382.85 : x
  2. Step 2: Convert to fraction form
    93,989.59/140,647.56 = 81,382.85/x
  3. Step 3: Cross multiply
    93,989.59x = 140,647.56 × 81,382.85
  4. Step 4: Simplify right side
    93,989.59x = 11,446,299,278.35
  5. Step 5: Solve for x
    x = 11,446,299,278.35/93,989.59
  6. Step 6: Final answer
    x = 121,782.63

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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.