Home / 70,354.45-105,537.18-20,435.38

Finding the Fourth Proportional to 70,354.45, 105,537.18 and 20,435.38

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Solution

The fourth proportional to 70,354.45, 105,537.18 and 20,435.38 is: 30,654.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,354.45 : 105,537.18 = 20,435.38 : x
  2. Step 2: Convert to fraction form
    70,354.45/105,537.18 = 20,435.38/x
  3. Step 3: Cross multiply
    70,354.45x = 105,537.18 × 20,435.38
  4. Step 4: Simplify right side
    70,354.45x = 2,156,692,377.43
  5. Step 5: Solve for x
    x = 2,156,692,377.43/70,354.45
  6. Step 6: Final answer
    x = 30,654.67

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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.