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Finding the Fourth Proportional to 128,600.97, 177,469.31 and 71,244.02

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Solution

The fourth proportional to 128,600.97, 177,469.31 and 71,244.02 is: 98,316.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.97 : 177,469.31 = 71,244.02 : x
  2. Step 2: Convert to fraction form
    128,600.97/177,469.31 = 71,244.02/x
  3. Step 3: Cross multiply
    128,600.97x = 177,469.31 × 71,244.02
  4. Step 4: Simplify right side
    128,600.97x = 12,643,627,692.81
  5. Step 5: Solve for x
    x = 12,643,627,692.81/128,600.97
  6. Step 6: Final answer
    x = 98,316.74

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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.