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Finding the Fourth Proportional to 123,702.80, 170,698.38 and 69,991.88

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Solution

The fourth proportional to 123,702.80, 170,698.38 and 69,991.88 is: 96,582.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,702.80 : 170,698.38 = 69,991.88 : x
  2. Step 2: Convert to fraction form
    123,702.80/170,698.38 = 69,991.88/x
  3. Step 3: Cross multiply
    123,702.80x = 170,698.38 × 69,991.88
  4. Step 4: Simplify right side
    123,702.80x = 11,947,500,529.15
  5. Step 5: Solve for x
    x = 11,947,500,529.15/123,702.80
  6. Step 6: Final answer
    x = 96,582.30

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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.