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Finding the Fourth Proportional to 66,407,713.88, 99,407,266.43 and 43,328,954.12

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Solution

The fourth proportional to 66,407,713.88, 99,407,266.43 and 43,328,954.12 is: 64,860,128.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,407,713.88 : 99,407,266.43 = 43,328,954.12 : x
  2. Step 2: Convert to fraction form
    66,407,713.88/99,407,266.43 = 43,328,954.12/x
  3. Step 3: Cross multiply
    66,407,713.88x = 99,407,266.43 × 43,328,954.12
  4. Step 4: Simplify right side
    66,407,713.88x = 4,307,212,885,626,405
  5. Step 5: Solve for x
    x = 4,307,212,885,626,405/66,407,713.88
  6. Step 6: Final answer
    x = 64,860,128.96

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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.