Home / 128,610.72-177,483.24-74,932.56

Finding the Fourth Proportional to 128,610.72, 177,483.24 and 74,932.56

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Solution

The fourth proportional to 128,610.72, 177,483.24 and 74,932.56 is: 103,407.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,610.72 : 177,483.24 = 74,932.56 : x
  2. Step 2: Convert to fraction form
    128,610.72/177,483.24 = 74,932.56/x
  3. Step 3: Cross multiply
    128,610.72x = 177,483.24 × 74,932.56
  4. Step 4: Simplify right side
    128,610.72x = 13,299,273,530.29
  5. Step 5: Solve for x
    x = 13,299,273,530.29/128,610.72
  6. Step 6: Final answer
    x = 103,407.19

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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.