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Finding the Fourth Proportional to 61,318.81, 91,943.52 and 21,319.39

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Solution

The fourth proportional to 61,318.81, 91,943.52 and 21,319.39 is: 31,967.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,318.81 : 91,943.52 = 21,319.39 : x
  2. Step 2: Convert to fraction form
    61,318.81/91,943.52 = 21,319.39/x
  3. Step 3: Cross multiply
    61,318.81x = 91,943.52 × 21,319.39
  4. Step 4: Simplify right side
    61,318.81x = 1,960,179,760.85
  5. Step 5: Solve for x
    x = 1,960,179,760.85/61,318.81
  6. Step 6: Final answer
    x = 31,967.02

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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.