Home / 128,541.33-177,390-74,835.90

Finding the Fourth Proportional to 128,541.33, 177,390 and 74,835.90

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Solution

The fourth proportional to 128,541.33, 177,390 and 74,835.90 is: 103,275.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,541.33 : 177,390 = 74,835.90 : x
  2. Step 2: Convert to fraction form
    128,541.33/177,390 = 74,835.90/x
  3. Step 3: Cross multiply
    128,541.33x = 177,390 × 74,835.90
  4. Step 4: Simplify right side
    128,541.33x = 13,275,140,301.00
  5. Step 5: Solve for x
    x = 13,275,140,301.00/128,541.33
  6. Step 6: Final answer
    x = 103,275.27

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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.