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Finding the Fourth Proportional to 172,700.65, 259,085.90 and 72,861.06

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Solution

The fourth proportional to 172,700.65, 259,085.90 and 72,861.06 is: 109,306.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,700.65 : 259,085.90 = 72,861.06 : x
  2. Step 2: Convert to fraction form
    172,700.65/259,085.90 = 72,861.06/x
  3. Step 3: Cross multiply
    172,700.65x = 259,085.90 × 72,861.06
  4. Step 4: Simplify right side
    172,700.65x = 18,877,273,305.05
  5. Step 5: Solve for x
    x = 18,877,273,305.05/172,700.65
  6. Step 6: Final answer
    x = 109,306.32

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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.