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Finding the Fourth Proportional to 172,385,999.70, 258,578,999.55 and 172,385,999.70

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Solution

The fourth proportional to 172,385,999.70, 258,578,999.55 and 172,385,999.70 is: 258,578,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,385,999.70 : 258,578,999.55 = 172,385,999.70 : x
  2. Step 2: Convert to fraction form
    172,385,999.70/258,578,999.55 = 172,385,999.70/x
  3. Step 3: Cross multiply
    172,385,999.70x = 258,578,999.55 × 172,385,999.70
  4. Step 4: Simplify right side
    172,385,999.70x = 44,575,399,338,852,600
  5. Step 5: Solve for x
    x = 44,575,399,338,852,600/172,385,999.70
  6. Step 6: Final answer
    x = 258,578,999.55

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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.