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Finding the Fourth Proportional to 109,675.80, 164,513.70 and 81,682.20

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Solution

The fourth proportional to 109,675.80, 164,513.70 and 81,682.20 is: 122,523.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,675.80 : 164,513.70 = 81,682.20 : x
  2. Step 2: Convert to fraction form
    109,675.80/164,513.70 = 81,682.20/x
  3. Step 3: Cross multiply
    109,675.80x = 164,513.70 × 81,682.20
  4. Step 4: Simplify right side
    109,675.80x = 13,437,840,946.14
  5. Step 5: Solve for x
    x = 13,437,840,946.14/109,675.80
  6. Step 6: Final answer
    x = 122,523.30

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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.