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Finding the Third Proportional to 64,972.13 and 143,385.19

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Solution

The third proportional to 64,972.13 and 143,385.19 is: 316,432.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,972.13 : 143,385.19 = 143,385.19 : x
  2. Step 2: Convert to fraction form
    64,972.13/143,385.19 = 143,385.19/x
  3. Step 3: Cross multiply
    64,972.13x = 143,385.19 × 143,385.19
  4. Step 4: Simplify right side
    64,972.13x = 20,559,311,994.41
  5. Step 5: Solve for x
    x = 20,559,311,994.41/64,972.13
  6. Step 6: Final answer
    x = 316,432.81

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.