Home / 128,427.82-177,220.74-71,828.26

Finding the Fourth Proportional to 128,427.82, 177,220.74 and 71,828.26

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Solution

The fourth proportional to 128,427.82, 177,220.74 and 71,828.26 is: 99,117.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,427.82 : 177,220.74 = 71,828.26 : x
  2. Step 2: Convert to fraction form
    128,427.82/177,220.74 = 71,828.26/x
  3. Step 3: Cross multiply
    128,427.82x = 177,220.74 × 71,828.26
  4. Step 4: Simplify right side
    128,427.82x = 12,729,457,390.11
  5. Step 5: Solve for x
    x = 12,729,457,390.11/128,427.82
  6. Step 6: Final answer
    x = 99,117.60

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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.