Home / 100,378.09-138,521.96-55,056.44

Finding the Fourth Proportional to 100,378.09, 138,521.96 and 55,056.44

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Solution

The fourth proportional to 100,378.09, 138,521.96 and 55,056.44 is: 75,978.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,378.09 : 138,521.96 = 55,056.44 : x
  2. Step 2: Convert to fraction form
    100,378.09/138,521.96 = 55,056.44/x
  3. Step 3: Cross multiply
    100,378.09x = 138,521.96 × 55,056.44
  4. Step 4: Simplify right side
    100,378.09x = 7,626,526,463.37
  5. Step 5: Solve for x
    x = 7,626,526,463.37/100,378.09
  6. Step 6: Final answer
    x = 75,978.00

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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.