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Finding the Fourth Proportional to 68,457.80, 102,686.70 and 60,422.60

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Solution

The fourth proportional to 68,457.80, 102,686.70 and 60,422.60 is: 90,633.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,457.80 : 102,686.70 = 60,422.60 : x
  2. Step 2: Convert to fraction form
    68,457.80/102,686.70 = 60,422.60/x
  3. Step 3: Cross multiply
    68,457.80x = 102,686.70 × 60,422.60
  4. Step 4: Simplify right side
    68,457.80x = 6,204,597,399.42
  5. Step 5: Solve for x
    x = 6,204,597,399.42/68,457.80
  6. Step 6: Final answer
    x = 90,633.90

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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.