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Finding the Fourth Proportional to 78,770.73, 108,666.09 and 53,286.02

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Solution

The fourth proportional to 78,770.73, 108,666.09 and 53,286.02 is: 73,509.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,770.73 : 108,666.09 = 53,286.02 : x
  2. Step 2: Convert to fraction form
    78,770.73/108,666.09 = 53,286.02/x
  3. Step 3: Cross multiply
    78,770.73x = 108,666.09 × 53,286.02
  4. Step 4: Simplify right side
    78,770.73x = 5,790,382,901.73
  5. Step 5: Solve for x
    x = 5,790,382,901.73/78,770.73
  6. Step 6: Final answer
    x = 73,509.32

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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.