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Finding the Fourth Proportional to 418,699,892.78, 628,118,062.48 and 123,624,841.82

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Solution

The fourth proportional to 418,699,892.78, 628,118,062.48 and 123,624,841.82 is: 185,457,406.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,699,892.78 : 628,118,062.48 = 123,624,841.82 : x
  2. Step 2: Convert to fraction form
    418,699,892.78/628,118,062.48 = 123,624,841.82/x
  3. Step 3: Cross multiply
    418,699,892.78x = 628,118,062.48 × 123,624,841.82
  4. Step 4: Simplify right side
    418,699,892.78x = 77,650,996,115,388,816
  5. Step 5: Solve for x
    x = 77,650,996,115,388,816/418,699,892.78
  6. Step 6: Final answer
    x = 185,457,406.26

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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.