Home / 128,288.21-177,033.20-70,924.01

Finding the Fourth Proportional to 128,288.21, 177,033.20 and 70,924.01

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Solution

The fourth proportional to 128,288.21, 177,033.20 and 70,924.01 is: 97,872.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,288.21 : 177,033.20 = 70,924.01 : x
  2. Step 2: Convert to fraction form
    128,288.21/177,033.20 = 70,924.01/x
  3. Step 3: Cross multiply
    128,288.21x = 177,033.20 × 70,924.01
  4. Step 4: Simplify right side
    128,288.21x = 12,555,903,207.35
  5. Step 5: Solve for x
    x = 12,555,903,207.35/128,288.21
  6. Step 6: Final answer
    x = 97,872.62

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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.