Home / 136,309.85-188,117.78-78,964.59

Finding the Fourth Proportional to 136,309.85, 188,117.78 and 78,964.59

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Solution

The fourth proportional to 136,309.85, 188,117.78 and 78,964.59 is: 108,977.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,309.85 : 188,117.78 = 78,964.59 : x
  2. Step 2: Convert to fraction form
    136,309.85/188,117.78 = 78,964.59/x
  3. Step 3: Cross multiply
    136,309.85x = 188,117.78 × 78,964.59
  4. Step 4: Simplify right side
    136,309.85x = 14,854,643,369.41
  5. Step 5: Solve for x
    x = 14,854,643,369.41/136,309.85
  6. Step 6: Final answer
    x = 108,977.04

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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.