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Finding the Fourth Proportional to 66,658.56, 100,024.74 and 39,938.88

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Solution

The fourth proportional to 66,658.56, 100,024.74 and 39,938.88 is: 59,930.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,658.56 : 100,024.74 = 39,938.88 : x
  2. Step 2: Convert to fraction form
    66,658.56/100,024.74 = 39,938.88/x
  3. Step 3: Cross multiply
    66,658.56x = 100,024.74 × 39,938.88
  4. Step 4: Simplify right side
    66,658.56x = 3,994,876,087.89
  5. Step 5: Solve for x
    x = 3,994,876,087.89/66,658.56
  6. Step 6: Final answer
    x = 59,930.43

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1.5x scale

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.