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Finding the Fourth Proportional to 172,479.80, 258,719.70 and 72,752.60

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Solution

The fourth proportional to 172,479.80, 258,719.70 and 72,752.60 is: 109,128.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,479.80 : 258,719.70 = 72,752.60 : x
  2. Step 2: Convert to fraction form
    172,479.80/258,719.70 = 72,752.60/x
  3. Step 3: Cross multiply
    172,479.80x = 258,719.70 × 72,752.60
  4. Step 4: Simplify right side
    172,479.80x = 18,822,530,846.22
  5. Step 5: Solve for x
    x = 18,822,530,846.22/172,479.80
  6. Step 6: Final answer
    x = 109,128.90

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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.