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Finding the Fourth Proportional to 172,420.40, 258,630.90 and 54,100.82

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Solution

The fourth proportional to 172,420.40, 258,630.90 and 54,100.82 is: 81,151.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,420.40 : 258,630.90 = 54,100.82 : x
  2. Step 2: Convert to fraction form
    172,420.40/258,630.90 = 54,100.82/x
  3. Step 3: Cross multiply
    172,420.40x = 258,630.90 × 54,100.82
  4. Step 4: Simplify right side
    172,420.40x = 13,992,143,767.34
  5. Step 5: Solve for x
    x = 13,992,143,767.34/172,420.40
  6. Step 6: Final answer
    x = 81,151.32

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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.