Home / 126,638.40-174,780-76,365.12

Finding the Fourth Proportional to 126,638.40, 174,780 and 76,365.12

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Solution

The fourth proportional to 126,638.40, 174,780 and 76,365.12 is: 105,395.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,638.40 : 174,780 = 76,365.12 : x
  2. Step 2: Convert to fraction form
    126,638.40/174,780 = 76,365.12/x
  3. Step 3: Cross multiply
    126,638.40x = 174,780 × 76,365.12
  4. Step 4: Simplify right side
    126,638.40x = 13,347,095,673.60
  5. Step 5: Solve for x
    x = 13,347,095,673.60/126,638.40
  6. Step 6: Final answer
    x = 105,395.33

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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.