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Finding the Third Proportional to 135,078.25 and 312,681.50

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Solution

The third proportional to 135,078.25 and 312,681.50 is: 723,800.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,078.25 : 312,681.50 = 312,681.50 : x
  2. Step 2: Convert to fraction form
    135,078.25/312,681.50 = 312,681.50/x
  3. Step 3: Cross multiply
    135,078.25x = 312,681.50 × 312,681.50
  4. Step 4: Simplify right side
    135,078.25x = 97,769,720,442.25
  5. Step 5: Solve for x
    x = 97,769,720,442.25/135,078.25
  6. Step 6: Final answer
    x = 723,800.62

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.