Home / 157,439.58-217,262.30-85,821

Finding the Fourth Proportional to 157,439.58, 217,262.30 and 85,821

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Solution

The fourth proportional to 157,439.58, 217,262.30 and 85,821 is: 118,430.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,439.58 : 217,262.30 = 85,821 : x
  2. Step 2: Convert to fraction form
    157,439.58/217,262.30 = 85,821/x
  3. Step 3: Cross multiply
    157,439.58x = 217,262.30 × 85,821
  4. Step 4: Simplify right side
    157,439.58x = 18,645,667,419.20
  5. Step 5: Solve for x
    x = 18,645,667,419.20/157,439.58
  6. Step 6: Final answer
    x = 118,430.62

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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.