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Finding the Fourth Proportional to 172,981.80, 259,480.80 and 54,662.40

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Solution

The fourth proportional to 172,981.80, 259,480.80 and 54,662.40 is: 81,996.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,981.80 : 259,480.80 = 54,662.40 : x
  2. Step 2: Convert to fraction form
    172,981.80/259,480.80 = 54,662.40/x
  3. Step 3: Cross multiply
    172,981.80x = 259,480.80 × 54,662.40
  4. Step 4: Simplify right side
    172,981.80x = 14,183,843,281.92
  5. Step 5: Solve for x
    x = 14,183,843,281.92/172,981.80
  6. Step 6: Final answer
    x = 81,996.16

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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.