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Finding the Fourth Proportional to 68,638.60, 102,957.90 and 54,814.60

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Solution

The fourth proportional to 68,638.60, 102,957.90 and 54,814.60 is: 82,221.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,638.60 : 102,957.90 = 54,814.60 : x
  2. Step 2: Convert to fraction form
    68,638.60/102,957.90 = 54,814.60/x
  3. Step 3: Cross multiply
    68,638.60x = 102,957.90 × 54,814.60
  4. Step 4: Simplify right side
    68,638.60x = 5,643,596,105.34
  5. Step 5: Solve for x
    x = 5,643,596,105.34/68,638.60
  6. Step 6: Final answer
    x = 82,221.90

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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.