Home / 81,165,863.72-121,747,089.84-19,755,365.02

Finding the Fourth Proportional to 81,165,863.72, 121,747,089.84 and 19,755,365.02

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Solution

The fourth proportional to 81,165,863.72, 121,747,089.84 and 19,755,365.02 is: 29,632,632.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,165,863.72 : 121,747,089.84 = 19,755,365.02 : x
  2. Step 2: Convert to fraction form
    81,165,863.72/121,747,089.84 = 19,755,365.02/x
  3. Step 3: Cross multiply
    81,165,863.72x = 121,747,089.84 × 19,755,365.02
  4. Step 4: Simplify right side
    81,165,863.72x = 2,405,158,199,911,933.50
  5. Step 5: Solve for x
    x = 2,405,158,199,911,933.50/81,165,863.72
  6. Step 6: Final answer
    x = 29,632,632.36

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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.