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Finding the Fourth Proportional to 68,706.80, 103,060.20 and 53,135.60

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Solution

The fourth proportional to 68,706.80, 103,060.20 and 53,135.60 is: 79,703.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,706.80 : 103,060.20 = 53,135.60 : x
  2. Step 2: Convert to fraction form
    68,706.80/103,060.20 = 53,135.60/x
  3. Step 3: Cross multiply
    68,706.80x = 103,060.20 × 53,135.60
  4. Step 4: Simplify right side
    68,706.80x = 5,476,165,563.12
  5. Step 5: Solve for x
    x = 5,476,165,563.12/68,706.80
  6. Step 6: Final answer
    x = 79,703.40

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1.5x scale

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.