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Finding the Fourth Proportional to 68,708.94, 94,820.67 and 65,559.66

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Solution

The fourth proportional to 68,708.94, 94,820.67 and 65,559.66 is: 90,474.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,708.94 : 94,820.67 = 65,559.66 : x
  2. Step 2: Convert to fraction form
    68,708.94/94,820.67 = 65,559.66/x
  3. Step 3: Cross multiply
    68,708.94x = 94,820.67 × 65,559.66
  4. Step 4: Simplify right side
    68,708.94x = 6,216,410,886.17
  5. Step 5: Solve for x
    x = 6,216,410,886.17/68,708.94
  6. Step 6: Final answer
    x = 90,474.56

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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.