Home / 103,669.50-143,081.19-78,475.26

Finding the Fourth Proportional to 103,669.50, 143,081.19 and 78,475.26

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Solution

The fourth proportional to 103,669.50, 143,081.19 and 78,475.26 is: 108,308.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,669.50 : 143,081.19 = 78,475.26 : x
  2. Step 2: Convert to fraction form
    103,669.50/143,081.19 = 78,475.26/x
  3. Step 3: Cross multiply
    103,669.50x = 143,081.19 × 78,475.26
  4. Step 4: Simplify right side
    103,669.50x = 11,228,333,586.36
  5. Step 5: Solve for x
    x = 11,228,333,586.36/103,669.50
  6. Step 6: Final answer
    x = 108,308.94

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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.