Home / 103,890.68-143,356.37-57,939.55

Finding the Fourth Proportional to 103,890.68, 143,356.37 and 57,939.55

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Solution

The fourth proportional to 103,890.68, 143,356.37 and 57,939.55 is: 79,949.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,890.68 : 143,356.37 = 57,939.55 : x
  2. Step 2: Convert to fraction form
    103,890.68/143,356.37 = 57,939.55/x
  3. Step 3: Cross multiply
    103,890.68x = 143,356.37 × 57,939.55
  4. Step 4: Simplify right side
    103,890.68x = 8,306,003,970.16
  5. Step 5: Solve for x
    x = 8,306,003,970.16/103,890.68
  6. Step 6: Final answer
    x = 79,949.46

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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.