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Finding the Fourth Proportional to 170,000.80, 254,928.30 and 85,728.40

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Solution

The fourth proportional to 170,000.80, 254,928.30 and 85,728.40 is: 128,555.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,000.80 : 254,928.30 = 85,728.40 : x
  2. Step 2: Convert to fraction form
    170,000.80/254,928.30 = 85,728.40/x
  3. Step 3: Cross multiply
    170,000.80x = 254,928.30 × 85,728.40
  4. Step 4: Simplify right side
    170,000.80x = 21,854,595,273.72
  5. Step 5: Solve for x
    x = 21,854,595,273.72/170,000.80
  6. Step 6: Final answer
    x = 128,555.84

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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.