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Finding the Fourth Proportional to 170,145.42, 255,376.01 and 85,964.70

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Solution

The fourth proportional to 170,145.42, 255,376.01 and 85,964.70 is: 129,026.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,145.42 : 255,376.01 = 85,964.70 : x
  2. Step 2: Convert to fraction form
    170,145.42/255,376.01 = 85,964.70/x
  3. Step 3: Cross multiply
    170,145.42x = 255,376.01 × 85,964.70
  4. Step 4: Simplify right side
    170,145.42x = 21,953,322,086.85
  5. Step 5: Solve for x
    x = 21,953,322,086.85/170,145.42
  6. Step 6: Final answer
    x = 129,026.82

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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.