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Finding the Fourth Proportional to 145,402.33, 200,639.91 and 80,861.11

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Solution

The fourth proportional to 145,402.33, 200,639.91 and 80,861.11 is: 111,579.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,402.33 : 200,639.91 = 80,861.11 : x
  2. Step 2: Convert to fraction form
    145,402.33/200,639.91 = 80,861.11/x
  3. Step 3: Cross multiply
    145,402.33x = 200,639.91 × 80,861.11
  4. Step 4: Simplify right side
    145,402.33x = 16,223,965,832.90
  5. Step 5: Solve for x
    x = 16,223,965,832.90/145,402.33
  6. Step 6: Final answer
    x = 111,579.82

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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.