Home / 136,180.72-187,916.20-78,808.64

Finding the Fourth Proportional to 136,180.72, 187,916.20 and 78,808.64

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Solution

The fourth proportional to 136,180.72, 187,916.20 and 78,808.64 is: 108,748.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,180.72 : 187,916.20 = 78,808.64 : x
  2. Step 2: Convert to fraction form
    136,180.72/187,916.20 = 78,808.64/x
  3. Step 3: Cross multiply
    136,180.72x = 187,916.20 × 78,808.64
  4. Step 4: Simplify right side
    136,180.72x = 14,809,420,155.97
  5. Step 5: Solve for x
    x = 14,809,420,155.97/136,180.72
  6. Step 6: Final answer
    x = 108,748.29

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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.