Home / 128,983.33-178,008.18-71,633.71

Finding the Fourth Proportional to 128,983.33, 178,008.18 and 71,633.71

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Solution

The fourth proportional to 128,983.33, 178,008.18 and 71,633.71 is: 98,860.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,983.33 : 178,008.18 = 71,633.71 : x
  2. Step 2: Convert to fraction form
    128,983.33/178,008.18 = 71,633.71/x
  3. Step 3: Cross multiply
    128,983.33x = 178,008.18 × 71,633.71
  4. Step 4: Simplify right side
    128,983.33x = 12,751,386,343.75
  5. Step 5: Solve for x
    x = 12,751,386,343.75/128,983.33
  6. Step 6: Final answer
    x = 98,860.73

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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.