Home / 128,257.91-176,995.64-71,669.29

Finding the Fourth Proportional to 128,257.91, 176,995.64 and 71,669.29

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Solution

The fourth proportional to 128,257.91, 176,995.64 and 71,669.29 is: 98,903.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,257.91 : 176,995.64 = 71,669.29 : x
  2. Step 2: Convert to fraction form
    128,257.91/176,995.64 = 71,669.29/x
  3. Step 3: Cross multiply
    128,257.91x = 176,995.64 × 71,669.29
  4. Step 4: Simplify right side
    128,257.91x = 12,685,150,608.57
  5. Step 5: Solve for x
    x = 12,685,150,608.57/128,257.91
  6. Step 6: Final answer
    x = 98,903.46

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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.