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Finding the Fourth Proportional to 172,123.80, 258,056.10 and 72,202.20

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Solution

The fourth proportional to 172,123.80, 258,056.10 and 72,202.20 is: 108,248.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,123.80 : 258,056.10 = 72,202.20 : x
  2. Step 2: Convert to fraction form
    172,123.80/258,056.10 = 72,202.20/x
  3. Step 3: Cross multiply
    172,123.80x = 258,056.10 × 72,202.20
  4. Step 4: Simplify right side
    172,123.80x = 18,632,218,143.42
  5. Step 5: Solve for x
    x = 18,632,218,143.42/172,123.80
  6. Step 6: Final answer
    x = 108,248.94

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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.