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Finding the Third Proportional to 30,390.19 and 64,622.81

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Solution

The third proportional to 30,390.19 and 64,622.81 is: 137,416.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,390.19 : 64,622.81 = 64,622.81 : x
  2. Step 2: Convert to fraction form
    30,390.19/64,622.81 = 64,622.81/x
  3. Step 3: Cross multiply
    30,390.19x = 64,622.81 × 64,622.81
  4. Step 4: Simplify right side
    30,390.19x = 4,176,107,895.41
  5. Step 5: Solve for x
    x = 4,176,107,895.41/30,390.19
  6. Step 6: Final answer
    x = 137,416.33

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.