Home / 138,128.22-190,433.43-90,299.34

Finding the Fourth Proportional to 138,128.22, 190,433.43 and 90,299.34

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Solution

The fourth proportional to 138,128.22, 190,433.43 and 90,299.34 is: 124,493.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,128.22 : 190,433.43 = 90,299.34 : x
  2. Step 2: Convert to fraction form
    138,128.22/190,433.43 = 90,299.34/x
  3. Step 3: Cross multiply
    138,128.22x = 190,433.43 × 90,299.34
  4. Step 4: Simplify right side
    138,128.22x = 17,196,013,042.94
  5. Step 5: Solve for x
    x = 17,196,013,042.94/138,128.22
  6. Step 6: Final answer
    x = 124,493.12

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1.5x scale

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.