Home / 128,720.96-177,627.60-75,014.72

Finding the Fourth Proportional to 128,720.96, 177,627.60 and 75,014.72

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Solution

The fourth proportional to 128,720.96, 177,627.60 and 75,014.72 is: 103,516.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,720.96 : 177,627.60 = 75,014.72 : x
  2. Step 2: Convert to fraction form
    128,720.96/177,627.60 = 75,014.72/x
  3. Step 3: Cross multiply
    128,720.96x = 177,627.60 × 75,014.72
  4. Step 4: Simplify right side
    128,720.96x = 13,324,684,678.27
  5. Step 5: Solve for x
    x = 13,324,684,678.27/128,720.96
  6. Step 6: Final answer
    x = 103,516.04

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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.