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Finding the Fourth Proportional to 145,568.62, 200,890.59 and 81,040.50

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Solution

The fourth proportional to 145,568.62, 200,890.59 and 81,040.50 is: 111,839.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,568.62 : 200,890.59 = 81,040.50 : x
  2. Step 2: Convert to fraction form
    145,568.62/200,890.59 = 81,040.50/x
  3. Step 3: Cross multiply
    145,568.62x = 200,890.59 × 81,040.50
  4. Step 4: Simplify right side
    145,568.62x = 16,280,273,858.90
  5. Step 5: Solve for x
    x = 16,280,273,858.90/145,568.62
  6. Step 6: Final answer
    x = 111,839.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.