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Finding the Third Proportional to 42,904.13 and 66,431.81

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Solution

The third proportional to 42,904.13 and 66,431.81 is: 102,861.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,904.13 : 66,431.81 = 66,431.81 : x
  2. Step 2: Convert to fraction form
    42,904.13/66,431.81 = 66,431.81/x
  3. Step 3: Cross multiply
    42,904.13x = 66,431.81 × 66,431.81
  4. Step 4: Simplify right side
    42,904.13x = 4,413,185,712.04
  5. Step 5: Solve for x
    x = 4,413,185,712.04/42,904.13
  6. Step 6: Final answer
    x = 102,861.57

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.