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Finding the Fourth Proportional to 137,814.30, 206,721.45 and 120,318.30

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Solution

The fourth proportional to 137,814.30, 206,721.45 and 120,318.30 is: 180,477.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,814.30 : 206,721.45 = 120,318.30 : x
  2. Step 2: Convert to fraction form
    137,814.30/206,721.45 = 120,318.30/x
  3. Step 3: Cross multiply
    137,814.30x = 206,721.45 × 120,318.30
  4. Step 4: Simplify right side
    137,814.30x = 24,872,373,437.54
  5. Step 5: Solve for x
    x = 24,872,373,437.54/137,814.30
  6. Step 6: Final answer
    x = 180,477.45

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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.