Home / 142,979.72-197,312.09-79,317.56

Finding the Fourth Proportional to 142,979.72, 197,312.09 and 79,317.56

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Solution

The fourth proportional to 142,979.72, 197,312.09 and 79,317.56 is: 109,458.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,979.72 : 197,312.09 = 79,317.56 : x
  2. Step 2: Convert to fraction form
    142,979.72/197,312.09 = 79,317.56/x
  3. Step 3: Cross multiply
    142,979.72x = 197,312.09 × 79,317.56
  4. Step 4: Simplify right side
    142,979.72x = 15,650,313,633.99
  5. Step 5: Solve for x
    x = 15,650,313,633.99/142,979.72
  6. Step 6: Final answer
    x = 109,458.28

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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.