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Finding the Fourth Proportional to 172,673.44, 258,725.04 and 78,972.64

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Solution

The fourth proportional to 172,673.44, 258,725.04 and 78,972.64 is: 118,328.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,673.44 : 258,725.04 = 78,972.64 : x
  2. Step 2: Convert to fraction form
    172,673.44/258,725.04 = 78,972.64/x
  3. Step 3: Cross multiply
    172,673.44x = 258,725.04 × 78,972.64
  4. Step 4: Simplify right side
    172,673.44x = 20,432,199,442.91
  5. Step 5: Solve for x
    x = 20,432,199,442.91/172,673.44
  6. Step 6: Final answer
    x = 118,328.56

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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.