Home / 128,318.39-177,083.30-71,732.15

Finding the Fourth Proportional to 128,318.39, 177,083.30 and 71,732.15

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Solution

The fourth proportional to 128,318.39, 177,083.30 and 71,732.15 is: 98,992.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,318.39 : 177,083.30 = 71,732.15 : x
  2. Step 2: Convert to fraction form
    128,318.39/177,083.30 = 71,732.15/x
  3. Step 3: Cross multiply
    128,318.39x = 177,083.30 × 71,732.15
  4. Step 4: Simplify right side
    128,318.39x = 12,702,565,479.43
  5. Step 5: Solve for x
    x = 12,702,565,479.43/128,318.39
  6. Step 6: Final answer
    x = 98,992.56

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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.