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Finding the Fourth Proportional to 172,390.32, 258,574.73 and 82,496.87

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Solution

The fourth proportional to 172,390.32, 258,574.73 and 82,496.87 is: 123,740.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,390.32 : 258,574.73 = 82,496.87 : x
  2. Step 2: Convert to fraction form
    172,390.32/258,574.73 = 82,496.87/x
  3. Step 3: Cross multiply
    172,390.32x = 258,574.73 × 82,496.87
  4. Step 4: Simplify right side
    172,390.32x = 21,331,604,180.74
  5. Step 5: Solve for x
    x = 21,331,604,180.74/172,390.32
  6. Step 6: Final answer
    x = 123,740.15

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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.