Home / 128,823.09-177,785.31-71,471.44

Finding the Fourth Proportional to 128,823.09, 177,785.31 and 71,471.44

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Solution

The fourth proportional to 128,823.09, 177,785.31 and 71,471.44 is: 98,635.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,823.09 : 177,785.31 = 71,471.44 : x
  2. Step 2: Convert to fraction form
    128,823.09/177,785.31 = 71,471.44/x
  3. Step 3: Cross multiply
    128,823.09x = 177,785.31 × 71,471.44
  4. Step 4: Simplify right side
    128,823.09x = 12,706,572,116.55
  5. Step 5: Solve for x
    x = 12,706,572,116.55/128,823.09
  6. Step 6: Final answer
    x = 98,635.83

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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.