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Finding the Fourth Proportional to 73,010.81, 109,513.17 and 39,940.40

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Solution

The fourth proportional to 73,010.81, 109,513.17 and 39,940.40 is: 59,908.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,010.81 : 109,513.17 = 39,940.40 : x
  2. Step 2: Convert to fraction form
    73,010.81/109,513.17 = 39,940.40/x
  3. Step 3: Cross multiply
    73,010.81x = 109,513.17 × 39,940.40
  4. Step 4: Simplify right side
    73,010.81x = 4,373,999,267.50
  5. Step 5: Solve for x
    x = 4,373,999,267.50/73,010.81
  6. Step 6: Final answer
    x = 59,908.93

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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.