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Finding the Fourth Proportional to 99,690,036.80, 149,555,272.80 and 56,579,892.80

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Solution

The fourth proportional to 99,690,036.80, 149,555,272.80 and 56,579,892.80 is: 84,881,313.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,690,036.80 : 149,555,272.80 = 56,579,892.80 : x
  2. Step 2: Convert to fraction form
    99,690,036.80/149,555,272.80 = 56,579,892.80/x
  3. Step 3: Cross multiply
    99,690,036.80x = 149,555,272.80 × 56,579,892.80
  4. Step 4: Simplify right side
    99,690,036.80x = 8,461,821,302,698,756
  5. Step 5: Solve for x
    x = 8,461,821,302,698,756/99,690,036.80
  6. Step 6: Final answer
    x = 84,881,313.86

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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.