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Finding the Fourth Proportional to 58,582.57, 87,855.69 and 21,137.78

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Solution

The fourth proportional to 58,582.57, 87,855.69 and 21,137.78 is: 31,700.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,582.57 : 87,855.69 = 21,137.78 : x
  2. Step 2: Convert to fraction form
    58,582.57/87,855.69 = 21,137.78/x
  3. Step 3: Cross multiply
    58,582.57x = 87,855.69 × 21,137.78
  4. Step 4: Simplify right side
    58,582.57x = 1,857,074,246.97
  5. Step 5: Solve for x
    x = 1,857,074,246.97/58,582.57
  6. Step 6: Final answer
    x = 31,700.12

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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.