Home / 128,954.19-177,969.57-72,365.79

Finding the Fourth Proportional to 128,954.19, 177,969.57 and 72,365.79

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Solution

The fourth proportional to 128,954.19, 177,969.57 and 72,365.79 is: 99,871.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,954.19 : 177,969.57 = 72,365.79 : x
  2. Step 2: Convert to fraction form
    128,954.19/177,969.57 = 72,365.79/x
  3. Step 3: Cross multiply
    128,954.19x = 177,969.57 × 72,365.79
  4. Step 4: Simplify right side
    128,954.19x = 12,878,907,277.33
  5. Step 5: Solve for x
    x = 12,878,907,277.33/128,954.19
  6. Step 6: Final answer
    x = 99,871.96

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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.