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Finding the Fourth Proportional to 136,503.65, 188,491.14 and 85,601.63

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Solution

The fourth proportional to 136,503.65, 188,491.14 and 85,601.63 is: 118,203.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,503.65 : 188,491.14 = 85,601.63 : x
  2. Step 2: Convert to fraction form
    136,503.65/188,491.14 = 85,601.63/x
  3. Step 3: Cross multiply
    136,503.65x = 188,491.14 × 85,601.63
  4. Step 4: Simplify right side
    136,503.65x = 16,135,147,882.10
  5. Step 5: Solve for x
    x = 16,135,147,882.10/136,503.65
  6. Step 6: Final answer
    x = 118,203.06

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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.