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Finding the Fourth Proportional to 85,959.97, 128,967.97 and 43,243.35

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Solution

The fourth proportional to 85,959.97, 128,967.97 and 43,243.35 is: 64,879.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,959.97 : 128,967.97 = 43,243.35 : x
  2. Step 2: Convert to fraction form
    85,959.97/128,967.97 = 43,243.35/x
  3. Step 3: Cross multiply
    85,959.97x = 128,967.97 × 43,243.35
  4. Step 4: Simplify right side
    85,959.97x = 5,577,007,065.50
  5. Step 5: Solve for x
    x = 5,577,007,065.50/85,959.97
  6. Step 6: Final answer
    x = 64,879.12

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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.