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Finding the Fourth Proportional to 172,406.90, 258,610.35 and 133,040.90

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Solution

The fourth proportional to 172,406.90, 258,610.35 and 133,040.90 is: 199,561.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,406.90 : 258,610.35 = 133,040.90 : x
  2. Step 2: Convert to fraction form
    172,406.90/258,610.35 = 133,040.90/x
  3. Step 3: Cross multiply
    172,406.90x = 258,610.35 × 133,040.90
  4. Step 4: Simplify right side
    172,406.90x = 34,405,753,713.32
  5. Step 5: Solve for x
    x = 34,405,753,713.32/172,406.90
  6. Step 6: Final answer
    x = 199,561.35

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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.