Home / 142,291.29-196,362.05-78,629.09

Finding the Fourth Proportional to 142,291.29, 196,362.05 and 78,629.09

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Solution

The fourth proportional to 142,291.29, 196,362.05 and 78,629.09 is: 108,508.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,291.29 : 196,362.05 = 78,629.09 : x
  2. Step 2: Convert to fraction form
    142,291.29/196,362.05 = 78,629.09/x
  3. Step 3: Cross multiply
    142,291.29x = 196,362.05 × 78,629.09
  4. Step 4: Simplify right side
    142,291.29x = 15,439,769,302.03
  5. Step 5: Solve for x
    x = 15,439,769,302.03/142,291.29
  6. Step 6: Final answer
    x = 108,508.18

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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.