Home / 128,751.04-177,673.25-71,390.60

Finding the Fourth Proportional to 128,751.04, 177,673.25 and 71,390.60

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Solution

The fourth proportional to 128,751.04, 177,673.25 and 71,390.60 is: 98,517.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,751.04 : 177,673.25 = 71,390.60 : x
  2. Step 2: Convert to fraction form
    128,751.04/177,673.25 = 71,390.60/x
  3. Step 3: Cross multiply
    128,751.04x = 177,673.25 × 71,390.60
  4. Step 4: Simplify right side
    128,751.04x = 12,684,198,676.13
  5. Step 5: Solve for x
    x = 12,684,198,676.13/128,751.04
  6. Step 6: Final answer
    x = 98,517.26

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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.