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Finding the Fourth Proportional to 213,599.70, 320,428.35 and 73,401.30

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Solution

The fourth proportional to 213,599.70, 320,428.35 and 73,401.30 is: 110,111.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,599.70 : 320,428.35 = 73,401.30 : x
  2. Step 2: Convert to fraction form
    213,599.70/320,428.35 = 73,401.30/x
  3. Step 3: Cross multiply
    213,599.70x = 320,428.35 × 73,401.30
  4. Step 4: Simplify right side
    213,599.70x = 23,519,857,446.86
  5. Step 5: Solve for x
    x = 23,519,857,446.86/213,599.70
  6. Step 6: Final answer
    x = 110,111.85

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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.