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Finding the Fourth Proportional to 172,725,978.45, 259,318,813.98 and 90,902,317.17

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Solution

The fourth proportional to 172,725,978.45, 259,318,813.98 and 90,902,317.17 is: 136,474,439.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,725,978.45 : 259,318,813.98 = 90,902,317.17 : x
  2. Step 2: Convert to fraction form
    172,725,978.45/259,318,813.98 = 90,902,317.17/x
  3. Step 3: Cross multiply
    172,725,978.45x = 259,318,813.98 × 90,902,317.17
  4. Step 4: Simplify right side
    172,725,978.45x = 23,572,681,076,558,188
  5. Step 5: Solve for x
    x = 23,572,681,076,558,188/172,725,978.45
  6. Step 6: Final answer
    x = 136,474,439.39

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.