Home / 128,438.56-177,253.41-71,850.34

Finding the Fourth Proportional to 128,438.56, 177,253.41 and 71,850.34

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Solution

The fourth proportional to 128,438.56, 177,253.41 and 71,850.34 is: 99,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,438.56 : 177,253.41 = 71,850.34 : x
  2. Step 2: Convert to fraction form
    128,438.56/177,253.41 = 71,850.34/x
  3. Step 3: Cross multiply
    128,438.56x = 177,253.41 × 71,850.34
  4. Step 4: Simplify right side
    128,438.56x = 12,735,717,774.66
  5. Step 5: Solve for x
    x = 12,735,717,774.66/128,438.56
  6. Step 6: Final answer
    x = 99,158.05

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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.