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Finding the Fourth Proportional to 170,221.44, 255,372.66 and 85,774.08

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Solution

The fourth proportional to 170,221.44, 255,372.66 and 85,774.08 is: 128,681.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,221.44 : 255,372.66 = 85,774.08 : x
  2. Step 2: Convert to fraction form
    170,221.44/255,372.66 = 85,774.08/x
  3. Step 3: Cross multiply
    170,221.44x = 255,372.66 × 85,774.08
  4. Step 4: Simplify right side
    170,221.44x = 21,904,354,968.65
  5. Step 5: Solve for x
    x = 21,904,354,968.65/170,221.44
  6. Step 6: Final answer
    x = 128,681.53

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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.