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Finding the Fourth Proportional to 68,932.80, 95,186.40 and 66,703.68

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Solution

The fourth proportional to 68,932.80, 95,186.40 and 66,703.68 is: 92,108.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,932.80 : 95,186.40 = 66,703.68 : x
  2. Step 2: Convert to fraction form
    68,932.80/95,186.40 = 66,703.68/x
  3. Step 3: Cross multiply
    68,932.80x = 95,186.40 × 66,703.68
  4. Step 4: Simplify right side
    68,932.80x = 6,349,283,165.95
  5. Step 5: Solve for x
    x = 6,349,283,165.95/68,932.80
  6. Step 6: Final answer
    x = 92,108.30

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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.