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Finding the Fourth Proportional to 170,701.40, 256,052.10 and 81,909.20

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Solution

The fourth proportional to 170,701.40, 256,052.10 and 81,909.20 is: 122,863.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,701.40 : 256,052.10 = 81,909.20 : x
  2. Step 2: Convert to fraction form
    170,701.40/256,052.10 = 81,909.20/x
  3. Step 3: Cross multiply
    170,701.40x = 256,052.10 × 81,909.20
  4. Step 4: Simplify right side
    170,701.40x = 20,973,022,669.32
  5. Step 5: Solve for x
    x = 20,973,022,669.32/170,701.40
  6. Step 6: Final answer
    x = 122,863.80

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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.