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Finding the Fourth Proportional to 172,903.92, 259,176.06 and 72,980.70

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Solution

The fourth proportional to 172,903.92, 259,176.06 and 72,980.70 is: 109,395.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,903.92 : 259,176.06 = 72,980.70 : x
  2. Step 2: Convert to fraction form
    172,903.92/259,176.06 = 72,980.70/x
  3. Step 3: Cross multiply
    172,903.92x = 259,176.06 × 72,980.70
  4. Step 4: Simplify right side
    172,903.92x = 18,914,850,282.04
  5. Step 5: Solve for x
    x = 18,914,850,282.04/172,903.92
  6. Step 6: Final answer
    x = 109,395.15

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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.