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Finding the Fourth Proportional to 63,351.72, 87,434.64 and 36,489

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Solution

The fourth proportional to 63,351.72, 87,434.64 and 36,489 is: 50,360.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,351.72 : 87,434.64 = 36,489 : x
  2. Step 2: Convert to fraction form
    63,351.72/87,434.64 = 36,489/x
  3. Step 3: Cross multiply
    63,351.72x = 87,434.64 × 36,489
  4. Step 4: Simplify right side
    63,351.72x = 3,190,402,578.96
  5. Step 5: Solve for x
    x = 3,190,402,578.96/63,351.72
  6. Step 6: Final answer
    x = 50,360.16

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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.