Home / 128,087.90-176,753.97-71,502.86

Finding the Fourth Proportional to 128,087.90, 176,753.97 and 71,502.86

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Solution

The fourth proportional to 128,087.90, 176,753.97 and 71,502.86 is: 98,669.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,087.90 : 176,753.97 = 71,502.86 : x
  2. Step 2: Convert to fraction form
    128,087.90/176,753.97 = 71,502.86/x
  3. Step 3: Cross multiply
    128,087.90x = 176,753.97 × 71,502.86
  4. Step 4: Simplify right side
    128,087.90x = 12,638,414,371.35
  5. Step 5: Solve for x
    x = 12,638,414,371.35/128,087.90
  6. Step 6: Final answer
    x = 98,669.85

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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.