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Finding the Fourth Proportional to 58,305.69, 87,449.16 and 20,858.79

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Solution

The fourth proportional to 58,305.69, 87,449.16 and 20,858.79 is: 31,284.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,305.69 : 87,449.16 = 20,858.79 : x
  2. Step 2: Convert to fraction form
    58,305.69/87,449.16 = 20,858.79/x
  3. Step 3: Cross multiply
    58,305.69x = 87,449.16 × 20,858.79
  4. Step 4: Simplify right side
    58,305.69x = 1,824,083,664.12
  5. Step 5: Solve for x
    x = 1,824,083,664.12/58,305.69
  6. Step 6: Final answer
    x = 31,284.83

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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.