Home / 136,602.78-188,515.17-76,172.83

Finding the Fourth Proportional to 136,602.78, 188,515.17 and 76,172.83

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Solution

The fourth proportional to 136,602.78, 188,515.17 and 76,172.83 is: 105,120.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,602.78 : 188,515.17 = 76,172.83 : x
  2. Step 2: Convert to fraction form
    136,602.78/188,515.17 = 76,172.83/x
  3. Step 3: Cross multiply
    136,602.78x = 188,515.17 × 76,172.83
  4. Step 4: Simplify right side
    136,602.78x = 14,359,733,996.83
  5. Step 5: Solve for x
    x = 14,359,733,996.83/136,602.78
  6. Step 6: Final answer
    x = 105,120.36

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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.