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Finding the Fourth Proportional to 172,506.30, 258,682.65 and 79,040.70

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Solution

The fourth proportional to 172,506.30, 258,682.65 and 79,040.70 is: 118,525.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,506.30 : 258,682.65 = 79,040.70 : x
  2. Step 2: Convert to fraction form
    172,506.30/258,682.65 = 79,040.70/x
  3. Step 3: Cross multiply
    172,506.30x = 258,682.65 × 79,040.70
  4. Step 4: Simplify right side
    172,506.30x = 20,446,457,733.86
  5. Step 5: Solve for x
    x = 20,446,457,733.86/172,506.30
  6. Step 6: Final answer
    x = 118,525.86

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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.