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Finding the Fourth Proportional to 80,288.61, 110,735.91 and 54,815.51

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Solution

The fourth proportional to 80,288.61, 110,735.91 and 54,815.51 is: 75,602.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,288.61 : 110,735.91 = 54,815.51 : x
  2. Step 2: Convert to fraction form
    80,288.61/110,735.91 = 54,815.51/x
  3. Step 3: Cross multiply
    80,288.61x = 110,735.91 × 54,815.51
  4. Step 4: Simplify right side
    80,288.61x = 6,070,044,828.28
  5. Step 5: Solve for x
    x = 6,070,044,828.28/80,288.61
  6. Step 6: Final answer
    x = 75,602.81

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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.