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Finding the Fourth Proportional to 172,468.75, 258,744.78 and 54,140.09

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Solution

The fourth proportional to 172,468.75, 258,744.78 and 54,140.09 is: 81,223.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,468.75 : 258,744.78 = 54,140.09 : x
  2. Step 2: Convert to fraction form
    172,468.75/258,744.78 = 54,140.09/x
  3. Step 3: Cross multiply
    172,468.75x = 258,744.78 × 54,140.09
  4. Step 4: Simplify right side
    172,468.75x = 14,008,465,405.53
  5. Step 5: Solve for x
    x = 14,008,465,405.53/172,468.75
  6. Step 6: Final answer
    x = 81,223.21

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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.