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Finding the Fourth Proportional to 172,643,786.64, 258,987,229.38 and 67,585,559.88

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Solution

The fourth proportional to 172,643,786.64, 258,987,229.38 and 67,585,559.88 is: 101,386,775.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,643,786.64 : 258,987,229.38 = 67,585,559.88 : x
  2. Step 2: Convert to fraction form
    172,643,786.64/258,987,229.38 = 67,585,559.88/x
  3. Step 3: Cross multiply
    172,643,786.64x = 258,987,229.38 × 67,585,559.88
  4. Step 4: Simplify right side
    172,643,786.64x = 17,503,796,899,417,284
  5. Step 5: Solve for x
    x = 17,503,796,899,417,284/172,643,786.64
  6. Step 6: Final answer
    x = 101,386,775.86

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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.