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Finding the Fourth Proportional to 172,638.60, 258,957.90 and 54,346.20

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Solution

The fourth proportional to 172,638.60, 258,957.90 and 54,346.20 is: 81,519.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,638.60 : 258,957.90 = 54,346.20 : x
  2. Step 2: Convert to fraction form
    172,638.60/258,957.90 = 54,346.20/x
  3. Step 3: Cross multiply
    172,638.60x = 258,957.90 × 54,346.20
  4. Step 4: Simplify right side
    172,638.60x = 14,073,377,824.98
  5. Step 5: Solve for x
    x = 14,073,377,824.98/172,638.60
  6. Step 6: Final answer
    x = 81,519.30

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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.