Home / 128,119.40-176,801.10-71,529.56

Finding the Fourth Proportional to 128,119.40, 176,801.10 and 71,529.56

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Solution

The fourth proportional to 128,119.40, 176,801.10 and 71,529.56 is: 98,708.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,119.40 : 176,801.10 = 71,529.56 : x
  2. Step 2: Convert to fraction form
    128,119.40/176,801.10 = 71,529.56/x
  3. Step 3: Cross multiply
    128,119.40x = 176,801.10 × 71,529.56
  4. Step 4: Simplify right side
    128,119.40x = 12,646,504,890.52
  5. Step 5: Solve for x
    x = 12,646,504,890.52/128,119.40
  6. Step 6: Final answer
    x = 98,708.74

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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.