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Finding the Fourth Proportional to 172,120.96, 258,123.12 and 65,479.60

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Solution

The fourth proportional to 172,120.96, 258,123.12 and 65,479.60 is: 98,197.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,120.96 : 258,123.12 = 65,479.60 : x
  2. Step 2: Convert to fraction form
    172,120.96/258,123.12 = 65,479.60/x
  3. Step 3: Cross multiply
    172,120.96x = 258,123.12 × 65,479.60
  4. Step 4: Simplify right side
    172,120.96x = 16,901,798,648.35
  5. Step 5: Solve for x
    x = 16,901,798,648.35/172,120.96
  6. Step 6: Final answer
    x = 98,197.21

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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.