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Finding the Fourth Proportional to 208,673,087.80, 313,009,631.70 and 72,372,249.40

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Solution

The fourth proportional to 208,673,087.80, 313,009,631.70 and 72,372,249.40 is: 108,558,374.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,673,087.80 : 313,009,631.70 = 72,372,249.40 : x
  2. Step 2: Convert to fraction form
    208,673,087.80/313,009,631.70 = 72,372,249.40/x
  3. Step 3: Cross multiply
    208,673,087.80x = 313,009,631.70 × 72,372,249.40
  4. Step 4: Simplify right side
    208,673,087.80x = 22,653,211,129,994,548
  5. Step 5: Solve for x
    x = 22,653,211,129,994,548/208,673,087.80
  6. Step 6: Final answer
    x = 108,558,374.10

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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.