Home / 142,358.75-196,438.05-78,687.89

Finding the Fourth Proportional to 142,358.75, 196,438.05 and 78,687.89

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Solution

The fourth proportional to 142,358.75, 196,438.05 and 78,687.89 is: 108,579.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,358.75 : 196,438.05 = 78,687.89 : x
  2. Step 2: Convert to fraction form
    142,358.75/196,438.05 = 78,687.89/x
  3. Step 3: Cross multiply
    142,358.75x = 196,438.05 × 78,687.89
  4. Step 4: Simplify right side
    142,358.75x = 15,457,295,670.21
  5. Step 5: Solve for x
    x = 15,457,295,670.21/142,358.75
  6. Step 6: Final answer
    x = 108,579.88

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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.