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Finding the Fourth Proportional to 77,635.89, 107,131.63 and 43,638.98

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Solution

The fourth proportional to 77,635.89, 107,131.63 and 43,638.98 is: 60,218.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,635.89 : 107,131.63 = 43,638.98 : x
  2. Step 2: Convert to fraction form
    77,635.89/107,131.63 = 43,638.98/x
  3. Step 3: Cross multiply
    77,635.89x = 107,131.63 × 43,638.98
  4. Step 4: Simplify right side
    77,635.89x = 4,675,114,414.18
  5. Step 5: Solve for x
    x = 4,675,114,414.18/77,635.89
  6. Step 6: Final answer
    x = 60,218.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.