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Finding the Fourth Proportional to 81,759.88, 112,914.30 and 56,332.36

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Solution

The fourth proportional to 81,759.88, 112,914.30 and 56,332.36 is: 77,797.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,759.88 : 112,914.30 = 56,332.36 : x
  2. Step 2: Convert to fraction form
    81,759.88/112,914.30 = 56,332.36/x
  3. Step 3: Cross multiply
    81,759.88x = 112,914.30 × 56,332.36
  4. Step 4: Simplify right side
    81,759.88x = 6,360,728,996.75
  5. Step 5: Solve for x
    x = 6,360,728,996.75/81,759.88
  6. Step 6: Final answer
    x = 77,797.68

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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.