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Finding the Fourth Proportional to 68,340.30, 94,304.94 and 39,660.80

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Solution

The fourth proportional to 68,340.30, 94,304.94 and 39,660.80 is: 54,729.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,340.30 : 94,304.94 = 39,660.80 : x
  2. Step 2: Convert to fraction form
    68,340.30/94,304.94 = 39,660.80/x
  3. Step 3: Cross multiply
    68,340.30x = 94,304.94 × 39,660.80
  4. Step 4: Simplify right side
    68,340.30x = 3,740,209,364.35
  5. Step 5: Solve for x
    x = 3,740,209,364.35/68,340.30
  6. Step 6: Final answer
    x = 54,729.19

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1.5x scale

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.