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Finding the Fourth Proportional to 113,605.80, 170,408.70 and 72,236.20

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Solution

The fourth proportional to 113,605.80, 170,408.70 and 72,236.20 is: 108,354.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,605.80 : 170,408.70 = 72,236.20 : x
  2. Step 2: Convert to fraction form
    113,605.80/170,408.70 = 72,236.20/x
  3. Step 3: Cross multiply
    113,605.80x = 170,408.70 × 72,236.20
  4. Step 4: Simplify right side
    113,605.80x = 12,309,676,934.94
  5. Step 5: Solve for x
    x = 12,309,676,934.94/113,605.80
  6. Step 6: Final answer
    x = 108,354.30

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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.