Home / 201,439.10-278,000.43-120,864.62

Finding the Fourth Proportional to 201,439.10, 278,000.43 and 120,864.62

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Solution

The fourth proportional to 201,439.10, 278,000.43 and 120,864.62 is: 166,801.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,439.10 : 278,000.43 = 120,864.62 : x
  2. Step 2: Convert to fraction form
    201,439.10/278,000.43 = 120,864.62/x
  3. Step 3: Cross multiply
    201,439.10x = 278,000.43 × 120,864.62
  4. Step 4: Simplify right side
    201,439.10x = 33,600,416,331.79
  5. Step 5: Solve for x
    x = 33,600,416,331.79/201,439.10
  6. Step 6: Final answer
    x = 166,801.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.