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Finding the Fourth Proportional to 128,371.44, 177,148.83 and 71,013.04

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Solution

The fourth proportional to 128,371.44, 177,148.83 and 71,013.04 is: 97,995.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,371.44 : 177,148.83 = 71,013.04 : x
  2. Step 2: Convert to fraction form
    128,371.44/177,148.83 = 71,013.04/x
  3. Step 3: Cross multiply
    128,371.44x = 177,148.83 × 71,013.04
  4. Step 4: Simplify right side
    128,371.44x = 12,579,876,950.74
  5. Step 5: Solve for x
    x = 12,579,876,950.74/128,371.44
  6. Step 6: Final answer
    x = 97,995.92

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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.