Home / 128,923.28-177,905.22-71,558.09

Finding the Fourth Proportional to 128,923.28, 177,905.22 and 71,558.09

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Solution

The fourth proportional to 128,923.28, 177,905.22 and 71,558.09 is: 98,745.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,923.28 : 177,905.22 = 71,558.09 : x
  2. Step 2: Convert to fraction form
    128,923.28/177,905.22 = 71,558.09/x
  3. Step 3: Cross multiply
    128,923.28x = 177,905.22 × 71,558.09
  4. Step 4: Simplify right side
    128,923.28x = 12,730,558,444.64
  5. Step 5: Solve for x
    x = 12,730,558,444.64/128,923.28
  6. Step 6: Final answer
    x = 98,745.22

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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.