Home / 135,689.09-187,128.38-84,706.54

Finding the Fourth Proportional to 135,689.09, 187,128.38 and 84,706.54

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Solution

The fourth proportional to 135,689.09, 187,128.38 and 84,706.54 is: 116,818.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,689.09 : 187,128.38 = 84,706.54 : x
  2. Step 2: Convert to fraction form
    135,689.09/187,128.38 = 84,706.54/x
  3. Step 3: Cross multiply
    135,689.09x = 187,128.38 × 84,706.54
  4. Step 4: Simplify right side
    135,689.09x = 15,850,997,349.55
  5. Step 5: Solve for x
    x = 15,850,997,349.55/135,689.09
  6. Step 6: Final answer
    x = 116,818.51

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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.