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Finding the Third Proportional to 78,639,825 and 172,396,185

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Solution

The third proportional to 78,639,825 and 172,396,185 is: 377,931,214.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639,825 : 172,396,185 = 172,396,185 : x
  2. Step 2: Convert to fraction form
    78,639,825/172,396,185 = 172,396,185/x
  3. Step 3: Cross multiply
    78,639,825x = 172,396,185 × 172,396,185
  4. Step 4: Simplify right side
    78,639,825x = 29,720,444,602,554,224
  5. Step 5: Solve for x
    x = 29,720,444,602,554,224/78,639,825
  6. Step 6: Final answer
    x = 377,931,214.91

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.