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Finding the Fourth Proportional to 105,159.66, 145,137.00 and 66,879.30

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Solution

The fourth proportional to 105,159.66, 145,137.00 and 66,879.30 is: 92,304.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,159.66 : 145,137.00 = 66,879.30 : x
  2. Step 2: Convert to fraction form
    105,159.66/145,137.00 = 66,879.30/x
  3. Step 3: Cross multiply
    105,159.66x = 145,137.00 × 66,879.30
  4. Step 4: Simplify right side
    105,159.66x = 9,706,659,904.02
  5. Step 5: Solve for x
    x = 9,706,659,904.02/105,159.66
  6. Step 6: Final answer
    x = 92,304.03

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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.