Home / 138,110.31-190,779.84-108,272.34

Finding the Fourth Proportional to 138,110.31, 190,779.84 and 108,272.34

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Solution

The fourth proportional to 138,110.31, 190,779.84 and 108,272.34 is: 149,562.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,110.31 : 190,779.84 = 108,272.34 : x
  2. Step 2: Convert to fraction form
    138,110.31/190,779.84 = 108,272.34/x
  3. Step 3: Cross multiply
    138,110.31x = 190,779.84 × 108,272.34
  4. Step 4: Simplify right side
    138,110.31x = 20,656,179,701.63
  5. Step 5: Solve for x
    x = 20,656,179,701.63/138,110.31
  6. Step 6: Final answer
    x = 149,562.91

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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.