Home / 128,647.16-177,619.73-80,322.66

Finding the Fourth Proportional to 128,647.16, 177,619.73 and 80,322.66

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Solution

The fourth proportional to 128,647.16, 177,619.73 and 80,322.66 is: 110,899.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,647.16 : 177,619.73 = 80,322.66 : x
  2. Step 2: Convert to fraction form
    128,647.16/177,619.73 = 80,322.66/x
  3. Step 3: Cross multiply
    128,647.16x = 177,619.73 × 80,322.66
  4. Step 4: Simplify right side
    128,647.16x = 14,266,888,981.28
  5. Step 5: Solve for x
    x = 14,266,888,981.28/128,647.16
  6. Step 6: Final answer
    x = 110,899.37

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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.