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Finding the Fourth Proportional to 55,115.64, 82,700.73 and 21,859.47

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Solution

The fourth proportional to 55,115.64, 82,700.73 and 21,859.47 is: 32,800.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,115.64 : 82,700.73 = 21,859.47 : x
  2. Step 2: Convert to fraction form
    55,115.64/82,700.73 = 21,859.47/x
  3. Step 3: Cross multiply
    55,115.64x = 82,700.73 × 21,859.47
  4. Step 4: Simplify right side
    55,115.64x = 1,807,794,126.41
  5. Step 5: Solve for x
    x = 1,807,794,126.41/55,115.64
  6. Step 6: Final answer
    x = 32,800.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.