Home / 258,915,375.18-388,376,428.32-86,392,188.63

Finding the Fourth Proportional to 258,915,375.18, 388,376,428.32 and 86,392,188.63

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Solution

The fourth proportional to 258,915,375.18, 388,376,428.32 and 86,392,188.63 is: 129,589,405.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,915,375.18 : 388,376,428.32 = 86,392,188.63 : x
  2. Step 2: Convert to fraction form
    258,915,375.18/388,376,428.32 = 86,392,188.63/x
  3. Step 3: Cross multiply
    258,915,375.18x = 388,376,428.32 × 86,392,188.63
  4. Step 4: Simplify right side
    258,915,375.18x = 33,552,689,654,867,112
  5. Step 5: Solve for x
    x = 33,552,689,654,867,112/258,915,375.18
  6. Step 6: Final answer
    x = 129,589,405.93

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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.