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Finding the Fourth Proportional to 172,078.60, 258,312.30 and 132,809.80

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Solution

The fourth proportional to 172,078.60, 258,312.30 and 132,809.80 is: 199,364.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,078.60 : 258,312.30 = 132,809.80 : x
  2. Step 2: Convert to fraction form
    172,078.60/258,312.30 = 132,809.80/x
  3. Step 3: Cross multiply
    172,078.60x = 258,312.30 × 132,809.80
  4. Step 4: Simplify right side
    172,078.60x = 34,306,404,900.54
  5. Step 5: Solve for x
    x = 34,306,404,900.54/172,078.60
  6. Step 6: Final answer
    x = 199,364.74

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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.