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Finding the Fourth Proportional to 66,572,815.40, 99,859,223.10 and 43,897,999.40

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Solution

The fourth proportional to 66,572,815.40, 99,859,223.10 and 43,897,999.40 is: 65,846,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,572,815.40 : 99,859,223.10 = 43,897,999.40 : x
  2. Step 2: Convert to fraction form
    66,572,815.40/99,859,223.10 = 43,897,999.40/x
  3. Step 3: Cross multiply
    66,572,815.40x = 99,859,223.10 × 43,897,999.40
  4. Step 4: Simplify right side
    66,572,815.40x = 4,383,620,115,728,265.50
  5. Step 5: Solve for x
    x = 4,383,620,115,728,265.50/66,572,815.40
  6. Step 6: Final answer
    x = 65,846,999.10

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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.