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Finding the Fourth Proportional to 172,398,462.40, 258,597,013.20 and 51,229,914.40

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Solution

The fourth proportional to 172,398,462.40, 258,597,013.20 and 51,229,914.40 is: 76,844,669.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,398,462.40 : 258,597,013.20 = 51,229,914.40 : x
  2. Step 2: Convert to fraction form
    172,398,462.40/258,597,013.20 = 51,229,914.40/x
  3. Step 3: Cross multiply
    172,398,462.40x = 258,597,013.20 × 51,229,914.40
  4. Step 4: Simplify right side
    172,398,462.40x = 13,247,902,850,331,670
  5. Step 5: Solve for x
    x = 13,247,902,850,331,670/172,398,462.40
  6. Step 6: Final answer
    x = 76,844,669.41

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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.