Home / 103,869.44-143,340.48-78,675.20

Finding the Fourth Proportional to 103,869.44, 143,340.48 and 78,675.20

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Solution

The fourth proportional to 103,869.44, 143,340.48 and 78,675.20 is: 108,572.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,869.44 : 143,340.48 = 78,675.20 : x
  2. Step 2: Convert to fraction form
    103,869.44/143,340.48 = 78,675.20/x
  3. Step 3: Cross multiply
    103,869.44x = 143,340.48 × 78,675.20
  4. Step 4: Simplify right side
    103,869.44x = 11,277,340,932.10
  5. Step 5: Solve for x
    x = 11,277,340,932.10/103,869.44
  6. Step 6: Final answer
    x = 108,572.27

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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.