Home / 258,915,371.66-388,376,423.07-86,392,185.15

Finding the Fourth Proportional to 258,915,371.66, 388,376,423.07 and 86,392,185.15

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Solution

The fourth proportional to 258,915,371.66, 388,376,423.07 and 86,392,185.15 is: 129,589,400.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,915,371.66 : 388,376,423.07 = 86,392,185.15 : x
  2. Step 2: Convert to fraction form
    258,915,371.66/388,376,423.07 = 86,392,185.15/x
  3. Step 3: Cross multiply
    258,915,371.66x = 388,376,423.07 × 86,392,185.15
  4. Step 4: Simplify right side
    258,915,371.66x = 33,552,687,849,758,172
  5. Step 5: Solve for x
    x = 33,552,687,849,758,172/258,915,371.66
  6. Step 6: Final answer
    x = 129,589,400.72

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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.