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Finding the Fourth Proportional to 80,128.99, 110,564.79 and 44,312

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Solution

The fourth proportional to 80,128.99, 110,564.79 and 44,312 is: 61,143.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,128.99 : 110,564.79 = 44,312 : x
  2. Step 2: Convert to fraction form
    80,128.99/110,564.79 = 44,312/x
  3. Step 3: Cross multiply
    80,128.99x = 110,564.79 × 44,312
  4. Step 4: Simplify right side
    80,128.99x = 4,899,346,974.48
  5. Step 5: Solve for x
    x = 4,899,346,974.48/80,128.99
  6. Step 6: Final answer
    x = 61,143.26

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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.