Home / 100,580.18-138,800.69-55,261.07

Finding the Fourth Proportional to 100,580.18, 138,800.69 and 55,261.07

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Solution

The fourth proportional to 100,580.18, 138,800.69 and 55,261.07 is: 76,260.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,580.18 : 138,800.69 = 55,261.07 : x
  2. Step 2: Convert to fraction form
    100,580.18/138,800.69 = 55,261.07/x
  3. Step 3: Cross multiply
    100,580.18x = 138,800.69 × 55,261.07
  4. Step 4: Simplify right side
    100,580.18x = 7,670,273,675.83
  5. Step 5: Solve for x
    x = 7,670,273,675.83/100,580.18
  6. Step 6: Final answer
    x = 76,260.29

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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.