Home / 85,934,890.38-128,901,072.57-21,238,701

Finding the Fourth Proportional to 85,934,890.38, 128,901,072.57 and 21,238,701

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Solution

The fourth proportional to 85,934,890.38, 128,901,072.57 and 21,238,701 is: 31,857,739.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,934,890.38 : 128,901,072.57 = 21,238,701 : x
  2. Step 2: Convert to fraction form
    85,934,890.38/128,901,072.57 = 21,238,701/x
  3. Step 3: Cross multiply
    85,934,890.38x = 128,901,072.57 × 21,238,701
  4. Step 4: Simplify right side
    85,934,890.38x = 2,737,691,338,893,531.50
  5. Step 5: Solve for x
    x = 2,737,691,338,893,531.50/85,934,890.38
  6. Step 6: Final answer
    x = 31,857,739.35

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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.