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Finding the Third Proportional to 81,573,859.69 and 129,381,208.88

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Solution

The third proportional to 81,573,859.69 and 129,381,208.88 is: 205,206,634.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,573,859.69 : 129,381,208.88 = 129,381,208.88 : x
  2. Step 2: Convert to fraction form
    81,573,859.69/129,381,208.88 = 129,381,208.88/x
  3. Step 3: Cross multiply
    81,573,859.69x = 129,381,208.88 × 129,381,208.88
  4. Step 4: Simplify right side
    81,573,859.69x = 16,739,497,209,956,378
  5. Step 5: Solve for x
    x = 16,739,497,209,956,378/81,573,859.69
  6. Step 6: Final answer
    x = 205,206,634.50

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.