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Finding the Fourth Proportional to 85,620.52, 128,417.82 and 23,295.88

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Solution

The fourth proportional to 85,620.52, 128,417.82 and 23,295.88 is: 34,940.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,620.52 : 128,417.82 = 23,295.88 : x
  2. Step 2: Convert to fraction form
    85,620.52/128,417.82 = 23,295.88/x
  3. Step 3: Cross multiply
    85,620.52x = 128,417.82 × 23,295.88
  4. Step 4: Simplify right side
    85,620.52x = 2,991,606,124.58
  5. Step 5: Solve for x
    x = 2,991,606,124.58/85,620.52
  6. Step 6: Final answer
    x = 34,940.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.