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Finding the Fourth Proportional to 79,665.12, 109,866.96 and 62,868.96

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Solution

The fourth proportional to 79,665.12, 109,866.96 and 62,868.96 is: 86,703.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,665.12 : 109,866.96 = 62,868.96 : x
  2. Step 2: Convert to fraction form
    79,665.12/109,866.96 = 62,868.96/x
  3. Step 3: Cross multiply
    79,665.12x = 109,866.96 × 62,868.96
  4. Step 4: Simplify right side
    79,665.12x = 6,907,221,513.56
  5. Step 5: Solve for x
    x = 6,907,221,513.56/79,665.12
  6. Step 6: Final answer
    x = 86,703.21

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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.