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Finding the Fourth Proportional to 145,620.92, 200,960.88 and 81,960.92

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Solution

The fourth proportional to 145,620.92, 200,960.88 and 81,960.92 is: 113,108.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,620.92 : 200,960.88 = 81,960.92 : x
  2. Step 2: Convert to fraction form
    145,620.92/200,960.88 = 81,960.92/x
  3. Step 3: Cross multiply
    145,620.92x = 200,960.88 × 81,960.92
  4. Step 4: Simplify right side
    145,620.92x = 16,470,938,608.81
  5. Step 5: Solve for x
    x = 16,470,938,608.81/145,620.92
  6. Step 6: Final answer
    x = 113,108.33

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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.