Home / 128,528.04-177,361.74-71,928.48

Finding the Fourth Proportional to 128,528.04, 177,361.74 and 71,928.48

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Solution

The fourth proportional to 128,528.04, 177,361.74 and 71,928.48 is: 99,257.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,528.04 : 177,361.74 = 71,928.48 : x
  2. Step 2: Convert to fraction form
    128,528.04/177,361.74 = 71,928.48/x
  3. Step 3: Cross multiply
    128,528.04x = 177,361.74 × 71,928.48
  4. Step 4: Simplify right side
    128,528.04x = 12,757,360,368.36
  5. Step 5: Solve for x
    x = 12,757,360,368.36/128,528.04
  6. Step 6: Final answer
    x = 99,257.41

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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.