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Finding the Fourth Proportional to 47,859.88, 71,789.82 and 12,798.63

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Solution

The fourth proportional to 47,859.88, 71,789.82 and 12,798.63 is: 19,197.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,859.88 : 71,789.82 = 12,798.63 : x
  2. Step 2: Convert to fraction form
    47,859.88/71,789.82 = 12,798.63/x
  3. Step 3: Cross multiply
    47,859.88x = 71,789.82 × 12,798.63
  4. Step 4: Simplify right side
    47,859.88x = 918,811,343.95
  5. Step 5: Solve for x
    x = 918,811,343.95/47,859.88
  6. Step 6: Final answer
    x = 19,197.95

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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.