Home / 135,343.50-186,731.08-78,743.94

Finding the Fourth Proportional to 135,343.50, 186,731.08 and 78,743.94

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Solution

The fourth proportional to 135,343.50, 186,731.08 and 78,743.94 is: 108,641.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,343.50 : 186,731.08 = 78,743.94 : x
  2. Step 2: Convert to fraction form
    135,343.50/186,731.08 = 78,743.94/x
  3. Step 3: Cross multiply
    135,343.50x = 186,731.08 × 78,743.94
  4. Step 4: Simplify right side
    135,343.50x = 14,703,940,959.66
  5. Step 5: Solve for x
    x = 14,703,940,959.66/135,343.50
  6. Step 6: Final answer
    x = 108,641.65

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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.