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Finding the Fourth Proportional to 172,446.80, 258,670.20 and 72,719.60

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Solution

The fourth proportional to 172,446.80, 258,670.20 and 72,719.60 is: 109,079.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,446.80 : 258,670.20 = 72,719.60 : x
  2. Step 2: Convert to fraction form
    172,446.80/258,670.20 = 72,719.60/x
  3. Step 3: Cross multiply
    172,446.80x = 258,670.20 × 72,719.60
  4. Step 4: Simplify right side
    172,446.80x = 18,810,393,475.92
  5. Step 5: Solve for x
    x = 18,810,393,475.92/172,446.80
  6. Step 6: Final answer
    x = 109,079.40

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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.