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Finding the Fourth Proportional to 83,782.21, 125,672.21 and 20,602.88

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Solution

The fourth proportional to 83,782.21, 125,672.21 and 20,602.88 is: 30,904.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,782.21 : 125,672.21 = 20,602.88 : x
  2. Step 2: Convert to fraction form
    83,782.21/125,672.21 = 20,602.88/x
  3. Step 3: Cross multiply
    83,782.21x = 125,672.21 × 20,602.88
  4. Step 4: Simplify right side
    83,782.21x = 2,589,209,461.96
  5. Step 5: Solve for x
    x = 2,589,209,461.96/83,782.21
  6. Step 6: Final answer
    x = 30,904.05

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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.