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Finding the Third Proportional to 142,878.38 and 307,261.88

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Solution

The third proportional to 142,878.38 and 307,261.88 is: 660,770.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,878.38 : 307,261.88 = 307,261.88 : x
  2. Step 2: Convert to fraction form
    142,878.38/307,261.88 = 307,261.88/x
  3. Step 3: Cross multiply
    142,878.38x = 307,261.88 × 307,261.88
  4. Step 4: Simplify right side
    142,878.38x = 94,409,859,828.52
  5. Step 5: Solve for x
    x = 94,409,859,828.52/142,878.38
  6. Step 6: Final answer
    x = 660,770.81

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.