Home / 128,422.56-177,239.92-71,845.60

Finding the Fourth Proportional to 128,422.56, 177,239.92 and 71,845.60

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Solution

The fourth proportional to 128,422.56, 177,239.92 and 71,845.60 is: 99,156.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,422.56 : 177,239.92 = 71,845.60 : x
  2. Step 2: Convert to fraction form
    128,422.56/177,239.92 = 71,845.60/x
  3. Step 3: Cross multiply
    128,422.56x = 177,239.92 × 71,845.60
  4. Step 4: Simplify right side
    128,422.56x = 12,733,908,396.35
  5. Step 5: Solve for x
    x = 12,733,908,396.35/128,422.56
  6. Step 6: Final answer
    x = 99,156.32

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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.