Home / 139,747.40-209,621.10-129,905.90

Finding the Fourth Proportional to 139,747.40, 209,621.10 and 129,905.90

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Solution

The fourth proportional to 139,747.40, 209,621.10 and 129,905.90 is: 194,858.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,747.40 : 209,621.10 = 129,905.90 : x
  2. Step 2: Convert to fraction form
    139,747.40/209,621.10 = 129,905.90/x
  3. Step 3: Cross multiply
    139,747.40x = 209,621.10 × 129,905.90
  4. Step 4: Simplify right side
    139,747.40x = 27,231,017,654.49
  5. Step 5: Solve for x
    x = 27,231,017,654.49/139,747.40
  6. Step 6: Final answer
    x = 194,858.85

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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.