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Finding the Fourth Proportional to 139,996.80, 209,940.48 and 61,057.08

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Solution

The fourth proportional to 139,996.80, 209,940.48 and 61,057.08 is: 91,561.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,996.80 : 209,940.48 = 61,057.08 : x
  2. Step 2: Convert to fraction form
    139,996.80/209,940.48 = 61,057.08/x
  3. Step 3: Cross multiply
    139,996.80x = 209,940.48 × 61,057.08
  4. Step 4: Simplify right side
    139,996.80x = 12,818,352,682.60
  5. Step 5: Solve for x
    x = 12,818,352,682.60/139,996.80
  6. Step 6: Final answer
    x = 91,561.75

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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.