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Finding the Fourth Proportional to 172,420.60, 258,630.90 and 83,847.10

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Solution

The fourth proportional to 172,420.60, 258,630.90 and 83,847.10 is: 125,770.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,420.60 : 258,630.90 = 83,847.10 : x
  2. Step 2: Convert to fraction form
    172,420.60/258,630.90 = 83,847.10/x
  3. Step 3: Cross multiply
    172,420.60x = 258,630.90 × 83,847.10
  4. Step 4: Simplify right side
    172,420.60x = 21,685,450,935.39
  5. Step 5: Solve for x
    x = 21,685,450,935.39/172,420.60
  6. Step 6: Final answer
    x = 125,770.65

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Similar ratio
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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.