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Finding the Fourth Proportional to 170,146.01, 255,376.90 and 85,965.30

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Solution

The fourth proportional to 170,146.01, 255,376.90 and 85,965.30 is: 129,027.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,146.01 : 255,376.90 = 85,965.30 : x
  2. Step 2: Convert to fraction form
    170,146.01/255,376.90 = 85,965.30/x
  3. Step 3: Cross multiply
    170,146.01x = 255,376.90 × 85,965.30
  4. Step 4: Simplify right side
    170,146.01x = 21,953,551,821.57
  5. Step 5: Solve for x
    x = 21,953,551,821.57/170,146.01
  6. Step 6: Final answer
    x = 129,027.72

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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.