Home / 81,717,212.80-122,623,512-45,356,118.40

Finding the Fourth Proportional to 81,717,212.80, 122,623,512 and 45,356,118.40

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Solution

The fourth proportional to 81,717,212.80, 122,623,512 and 45,356,118.40 is: 68,060,648.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,717,212.80 : 122,623,512 = 45,356,118.40 : x
  2. Step 2: Convert to fraction form
    81,717,212.80/122,623,512 = 45,356,118.40/x
  3. Step 3: Cross multiply
    81,717,212.80x = 122,623,512 × 45,356,118.40
  4. Step 4: Simplify right side
    81,717,212.80x = 5,561,726,528,895,821
  5. Step 5: Solve for x
    x = 5,561,726,528,895,821/81,717,212.80
  6. Step 6: Final answer
    x = 68,060,648.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.