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Finding the Fourth Proportional to 145,636.88, 200,979.36 and 81,975.68

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Solution

The fourth proportional to 145,636.88, 200,979.36 and 81,975.68 is: 113,126.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,636.88 : 200,979.36 = 81,975.68 : x
  2. Step 2: Convert to fraction form
    145,636.88/200,979.36 = 81,975.68/x
  3. Step 3: Cross multiply
    145,636.88x = 200,979.36 × 81,975.68
  4. Step 4: Simplify right side
    145,636.88x = 16,475,419,701.96
  5. Step 5: Solve for x
    x = 16,475,419,701.96/145,636.88
  6. Step 6: Final answer
    x = 113,126.70

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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.