Home / 126,005.40-188,886.60-72,642.60

Finding the Fourth Proportional to 126,005.40, 188,886.60 and 72,642.60

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Solution

The fourth proportional to 126,005.40, 188,886.60 and 72,642.60 is: 108,893.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,005.40 : 188,886.60 = 72,642.60 : x
  2. Step 2: Convert to fraction form
    126,005.40/188,886.60 = 72,642.60/x
  3. Step 3: Cross multiply
    126,005.40x = 188,886.60 × 72,642.60
  4. Step 4: Simplify right side
    126,005.40x = 13,721,213,729.16
  5. Step 5: Solve for x
    x = 13,721,213,729.16/126,005.40
  6. Step 6: Final answer
    x = 108,893.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.