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Finding the Fourth Proportional to 58,179, 87,268.50 and 21,243

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Solution

The fourth proportional to 58,179, 87,268.50 and 21,243 is: 31,864.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,179 : 87,268.50 = 21,243 : x
  2. Step 2: Convert to fraction form
    58,179/87,268.50 = 21,243/x
  3. Step 3: Cross multiply
    58,179x = 87,268.50 × 21,243
  4. Step 4: Simplify right side
    58,179x = 1,853,844,745.50
  5. Step 5: Solve for x
    x = 1,853,844,745.50/58,179
  6. Step 6: Final answer
    x = 31,864.50

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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.