Home / 119,128.40-164,160.24-85,040.72

Finding the Fourth Proportional to 119,128.40, 164,160.24 and 85,040.72

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Solution

The fourth proportional to 119,128.40, 164,160.24 and 85,040.72 is: 117,187.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,128.40 : 164,160.24 = 85,040.72 : x
  2. Step 2: Convert to fraction form
    119,128.40/164,160.24 = 85,040.72/x
  3. Step 3: Cross multiply
    119,128.40x = 164,160.24 × 85,040.72
  4. Step 4: Simplify right side
    119,128.40x = 13,960,305,004.97
  5. Step 5: Solve for x
    x = 13,960,305,004.97/119,128.40
  6. Step 6: Final answer
    x = 117,187.04

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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.