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Finding the Fourth Proportional to 58,578.57, 87,849.69 and 21,133.78

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Solution

The fourth proportional to 58,578.57, 87,849.69 and 21,133.78 is: 31,694.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,578.57 : 87,849.69 = 21,133.78 : x
  2. Step 2: Convert to fraction form
    58,578.57/87,849.69 = 21,133.78/x
  3. Step 3: Cross multiply
    58,578.57x = 87,849.69 × 21,133.78
  4. Step 4: Simplify right side
    58,578.57x = 1,856,595,656.00
  5. Step 5: Solve for x
    x = 1,856,595,656.00/58,578.57
  6. Step 6: Final answer
    x = 31,694.11

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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.