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Finding the Fourth Proportional to 172,472.25, 258,708.39 and 47,813.25

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Solution

The fourth proportional to 172,472.25, 258,708.39 and 47,813.25 is: 71,719.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,472.25 : 258,708.39 = 47,813.25 : x
  2. Step 2: Convert to fraction form
    172,472.25/258,708.39 = 47,813.25/x
  3. Step 3: Cross multiply
    172,472.25x = 258,708.39 × 47,813.25
  4. Step 4: Simplify right side
    172,472.25x = 12,369,688,928.17
  5. Step 5: Solve for x
    x = 12,369,688,928.17/172,472.25
  6. Step 6: Final answer
    x = 71,719.88

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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.