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Finding the Fourth Proportional to 63,778.47, 87,977.64 and 39,863.64

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Solution

The fourth proportional to 63,778.47, 87,977.64 and 39,863.64 is: 54,988.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,778.47 : 87,977.64 = 39,863.64 : x
  2. Step 2: Convert to fraction form
    63,778.47/87,977.64 = 39,863.64/x
  3. Step 3: Cross multiply
    63,778.47x = 87,977.64 × 39,863.64
  4. Step 4: Simplify right side
    63,778.47x = 3,507,108,969.01
  5. Step 5: Solve for x
    x = 3,507,108,969.01/63,778.47
  6. Step 6: Final answer
    x = 54,988.92

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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.