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Finding the Fourth Proportional to 172,415.80, 258,469.80 and 67,210.30

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Solution

The fourth proportional to 172,415.80, 258,469.80 and 67,210.30 is: 100,755.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,415.80 : 258,469.80 = 67,210.30 : x
  2. Step 2: Convert to fraction form
    172,415.80/258,469.80 = 67,210.30/x
  3. Step 3: Cross multiply
    172,415.80x = 258,469.80 × 67,210.30
  4. Step 4: Simplify right side
    172,415.80x = 17,371,832,798.94
  5. Step 5: Solve for x
    x = 17,371,832,798.94/172,415.80
  6. Step 6: Final answer
    x = 100,755.46

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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.