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Finding the Fourth Proportional to 81,989.80, 123,042.30 and 35,276.20

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Solution

The fourth proportional to 81,989.80, 123,042.30 and 35,276.20 is: 52,939.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,989.80 : 123,042.30 = 35,276.20 : x
  2. Step 2: Convert to fraction form
    81,989.80/123,042.30 = 35,276.20/x
  3. Step 3: Cross multiply
    81,989.80x = 123,042.30 × 35,276.20
  4. Step 4: Simplify right side
    81,989.80x = 4,340,464,783.26
  5. Step 5: Solve for x
    x = 4,340,464,783.26/81,989.80
  6. Step 6: Final answer
    x = 52,939.08

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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.