Home / 128,412.04-177,180.06-80,647.96

Finding the Fourth Proportional to 128,412.04, 177,180.06 and 80,647.96

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Solution

The fourth proportional to 128,412.04, 177,180.06 and 80,647.96 is: 111,276.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,412.04 : 177,180.06 = 80,647.96 : x
  2. Step 2: Convert to fraction form
    128,412.04/177,180.06 = 80,647.96/x
  3. Step 3: Cross multiply
    128,412.04x = 177,180.06 × 80,647.96
  4. Step 4: Simplify right side
    128,412.04x = 14,289,210,391.68
  5. Step 5: Solve for x
    x = 14,289,210,391.68/128,412.04
  6. Step 6: Final answer
    x = 111,276.25

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1.5x scale

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.