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Finding the Fourth Proportional to 58,315.69, 87,464.16 and 20,868.79

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Solution

The fourth proportional to 58,315.69, 87,464.16 and 20,868.79 is: 31,299.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,315.69 : 87,464.16 = 20,868.79 : x
  2. Step 2: Convert to fraction form
    58,315.69/87,464.16 = 20,868.79/x
  3. Step 3: Cross multiply
    58,315.69x = 87,464.16 × 20,868.79
  4. Step 4: Simplify right side
    58,315.69x = 1,825,271,187.57
  5. Step 5: Solve for x
    x = 1,825,271,187.57/58,315.69
  6. Step 6: Final answer
    x = 31,299.83

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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.