Home / 128,435.42-177,234.60-71,073.72

Finding the Fourth Proportional to 128,435.42, 177,234.60 and 71,073.72

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Solution

The fourth proportional to 128,435.42, 177,234.60 and 71,073.72 is: 98,078.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,435.42 : 177,234.60 = 71,073.72 : x
  2. Step 2: Convert to fraction form
    128,435.42/177,234.60 = 71,073.72/x
  3. Step 3: Cross multiply
    128,435.42x = 177,234.60 × 71,073.72
  4. Step 4: Simplify right side
    128,435.42x = 12,596,722,201.45
  5. Step 5: Solve for x
    x = 12,596,722,201.45/128,435.42
  6. Step 6: Final answer
    x = 98,078.26

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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.