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Finding the Fourth Proportional to 66,403.88, 99,625.32 and 19,657.97

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Solution

The fourth proportional to 66,403.88, 99,625.32 and 19,657.97 is: 29,492.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,403.88 : 99,625.32 = 19,657.97 : x
  2. Step 2: Convert to fraction form
    66,403.88/99,625.32 = 19,657.97/x
  3. Step 3: Cross multiply
    66,403.88x = 99,625.32 × 19,657.97
  4. Step 4: Simplify right side
    66,403.88x = 1,958,431,053.67
  5. Step 5: Solve for x
    x = 1,958,431,053.67/66,403.88
  6. Step 6: Final answer
    x = 29,492.72

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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.