Home / 66,115,209.40-99,172,814.10-20,690,927.80

Finding the Fourth Proportional to 66,115,209.40, 99,172,814.10 and 20,690,927.80

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Solution

The fourth proportional to 66,115,209.40, 99,172,814.10 and 20,690,927.80 is: 31,036,391.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,115,209.40 : 99,172,814.10 = 20,690,927.80 : x
  2. Step 2: Convert to fraction form
    66,115,209.40/99,172,814.10 = 20,690,927.80/x
  3. Step 3: Cross multiply
    66,115,209.40x = 99,172,814.10 × 20,690,927.80
  4. Step 4: Simplify right side
    66,115,209.40x = 2,051,977,536,265,922
  5. Step 5: Solve for x
    x = 2,051,977,536,265,922/66,115,209.40
  6. Step 6: Final answer
    x = 31,036,391.70

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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.