Home / 142,290.29-196,360.67-78,628.09

Finding the Fourth Proportional to 142,290.29, 196,360.67 and 78,628.09

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Solution

The fourth proportional to 142,290.29, 196,360.67 and 78,628.09 is: 108,506.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,290.29 : 196,360.67 = 78,628.09 : x
  2. Step 2: Convert to fraction form
    142,290.29/196,360.67 = 78,628.09/x
  3. Step 3: Cross multiply
    142,290.29x = 196,360.67 × 78,628.09
  4. Step 4: Simplify right side
    142,290.29x = 15,439,464,230.93
  5. Step 5: Solve for x
    x = 15,439,464,230.93/142,290.29
  6. Step 6: Final answer
    x = 108,506.80

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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.