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Finding the Fourth Proportional to 145,160.92, 200,310.96 and 81,486.64

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Solution

The fourth proportional to 145,160.92, 200,310.96 and 81,486.64 is: 112,445.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,160.92 : 200,310.96 = 81,486.64 : x
  2. Step 2: Convert to fraction form
    145,160.92/200,310.96 = 81,486.64/x
  3. Step 3: Cross multiply
    145,160.92x = 200,310.96 × 81,486.64
  4. Step 4: Simplify right side
    145,160.92x = 16,322,667,085.57
  5. Step 5: Solve for x
    x = 16,322,667,085.57/145,160.92
  6. Step 6: Final answer
    x = 112,445.33

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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.