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Finding the Fourth Proportional to 283,611.42, 425,391.21 and 86,619.42

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Solution

The fourth proportional to 283,611.42, 425,391.21 and 86,619.42 is: 129,921.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,611.42 : 425,391.21 = 86,619.42 : x
  2. Step 2: Convert to fraction form
    283,611.42/425,391.21 = 86,619.42/x
  3. Step 3: Cross multiply
    283,611.42x = 425,391.21 × 86,619.42
  4. Step 4: Simplify right side
    283,611.42x = 36,847,139,883.30
  5. Step 5: Solve for x
    x = 36,847,139,883.30/283,611.42
  6. Step 6: Final answer
    x = 129,921.21

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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.