Home / 128,216.46-176,939.19-71,628.78

Finding the Fourth Proportional to 128,216.46, 176,939.19 and 71,628.78

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Solution

The fourth proportional to 128,216.46, 176,939.19 and 71,628.78 is: 98,847.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,216.46 : 176,939.19 = 71,628.78 : x
  2. Step 2: Convert to fraction form
    128,216.46/176,939.19 = 71,628.78/x
  3. Step 3: Cross multiply
    128,216.46x = 176,939.19 × 71,628.78
  4. Step 4: Simplify right side
    128,216.46x = 12,673,938,313.89
  5. Step 5: Solve for x
    x = 12,673,938,313.89/128,216.46
  6. Step 6: Final answer
    x = 98,847.98

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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.