Home / 100,564.45-138,779.82-55,243.35

Finding the Fourth Proportional to 100,564.45, 138,779.82 and 55,243.35

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Solution

The fourth proportional to 100,564.45, 138,779.82 and 55,243.35 is: 76,236.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,564.45 : 138,779.82 = 55,243.35 : x
  2. Step 2: Convert to fraction form
    100,564.45/138,779.82 = 55,243.35/x
  3. Step 3: Cross multiply
    100,564.45x = 138,779.82 × 55,243.35
  4. Step 4: Simplify right side
    100,564.45x = 7,666,661,892.98
  5. Step 5: Solve for x
    x = 7,666,661,892.98/100,564.45
  6. Step 6: Final answer
    x = 76,236.31

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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.