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Finding the Fourth Proportional to 145,190.94, 200,352.60 and 81,516.60

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Solution

The fourth proportional to 145,190.94, 200,352.60 and 81,516.60 is: 112,486.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,190.94 : 200,352.60 = 81,516.60 : x
  2. Step 2: Convert to fraction form
    145,190.94/200,352.60 = 81,516.60/x
  3. Step 3: Cross multiply
    145,190.94x = 200,352.60 × 81,516.60
  4. Step 4: Simplify right side
    145,190.94x = 16,332,062,753.16
  5. Step 5: Solve for x
    x = 16,332,062,753.16/145,190.94
  6. Step 6: Final answer
    x = 112,486.79

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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.