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Finding the Fourth Proportional to 170,853.60, 256,280.40 and 86,872.80

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Solution

The fourth proportional to 170,853.60, 256,280.40 and 86,872.80 is: 130,309.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,853.60 : 256,280.40 = 86,872.80 : x
  2. Step 2: Convert to fraction form
    170,853.60/256,280.40 = 86,872.80/x
  3. Step 3: Cross multiply
    170,853.60x = 256,280.40 × 86,872.80
  4. Step 4: Simplify right side
    170,853.60x = 22,263,795,933.12
  5. Step 5: Solve for x
    x = 22,263,795,933.12/170,853.60
  6. Step 6: Final answer
    x = 130,309.20

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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.