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Finding the Fourth Proportional to 55,148.58, 82,685.88 and 21,859.74

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Solution

The fourth proportional to 55,148.58, 82,685.88 and 21,859.74 is: 32,774.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,148.58 : 82,685.88 = 21,859.74 : x
  2. Step 2: Convert to fraction form
    55,148.58/82,685.88 = 21,859.74/x
  3. Step 3: Cross multiply
    55,148.58x = 82,685.88 × 21,859.74
  4. Step 4: Simplify right side
    55,148.58x = 1,807,491,838.47
  5. Step 5: Solve for x
    x = 1,807,491,838.47/55,148.58
  6. Step 6: Final answer
    x = 32,774.95

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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.